How Much Is A Water Heater Expansion Tank? - ERNIEGRAVES

Do You Need a Water Heater Expansion Tank?

Because of the usual thermal expansion that occurs when water is heated, a basic tank water heater can cause stress on your plumbing pipes and fixtures when used in a closed system.
Basically, any closed system where water is heated can have an issue with this.
Both water heaters and boilers for home heating systems might be susceptible to this type of damage if no precautions are taken to avoid it from occurring.
When used in conjunction with a plumbing system, a water heater expansion tank can help to reduce the likelihood of pressure damage to the plumbing system.
For current on-demand, tankless water heaters, this is often not an issue.

Only older models with storage tanks are susceptible to this problem.

What Is a Water Heater Expansion Tank?

An expansion tank for a water heater serves as a safety precaution (sometimes called a thermal expansion tank).
As the name implies, it is an overflow receptacle that helps to relieve pressure created by the typical thermal expansion that occurs when water is heated.
It functions as an overflow receptacle by absorbing surplus water volume that happens during the heating process, as well as changes in the incoming water supply pressure, which are all absorbed by the expansion tank.
The thermal expansion of water causes it to expand when heated, resulting in the creation of more water volume every time the water heater heats the water.
When heated to 120 degrees Fahrenheit, the cold water in a normal 50-gallon water heater is predicted to expand to 52 gallons, according to industry standards.

This increased water volume can result in a rise in pressure in the plumbing system, which, if the pressure is high enough, can cause damage to the water heater, plumbing fixtures, and the water pipes themselves over time, depending on the situation.

Closed Water Supply Systems

An open system where expanding water has the ability to push back into the city’s water supply is not likely to encounter any issues.
The majority of residences, on the other hand, have a closed water supply system that is fitted with a one-way valve such as a backflow preventer, a check valve, or a pressure-reducer (PRV).
Due to the fact that the increased water pressure caused by thermal expansion cannot be sent back into the city water supply, it is most likely to cause damage in a closed system.
Even if you are using a city water supply (whether or not there is a check valve or a pressure relief valve installed), the additional pressure created by the heating of the household hot water might cause the relief valve to disperse water in many circumstances.
It is possible that thermal expansion tanks or cushion tanks will be required on the incoming cold water supply line.

The installation of expansion tanks in residential closed plumbing systems is required in most municipalities.You may be needed to install a water heater expansion tank if you have a backflow preventer installed on your main water line, depending on your state of residence.If you do not have a backflow preventer installed, you may be forced to install one.For more information, see the local building code or contact the building and safety department.

How a Water Heater Expansion Tank Is Installed

In the event that you do not have a one-way valve put on the main water line and, as a result, do not have a closed water system, a water heater expansion tank may still be beneficial to you in some circumstances.
It is customary to put expansion tanks above the water heater, on the cold water line before it enters the water heater; however, they can be positioned virtually anywhere on the cold water line prior to entrance into the water heater.
The presence of an expansion tank helps to avoid leaky faucets and running toilets by preventing the additional pressure that has built up in the system from reaching the fixtures and causing them to fail prematurely.
Prices for water heater expansion tanks begin at approximately $40 and can reach around $200; the price is mostly determined by the size of the tank.
A basic 2-gallon tank will suffice for the majority of household setups that use 40- or 50-gallon water heaters.

The tank is quite simple to install because it uses a standard 3/4-inch threaded connection.If there isn’t currently a tee fitting placed above the water heater, one will need to be installed as soon as possible.If you’re hiring a plumber to install a water heater, it’s a good idea to ask for a quote for the installation of an expansion tank at the same time as well.If it is done at the same time as your other bills, it may not cost much more than you are already paying.In the event that you are building a water heater yourself, consider adding an expansion tank even if it is not necessary, since the advantages greatly exceed the time and money involved in the process.

$145 – $350, Installed

The cost to install a water heater expansion tank ranges from $55 and up for a rare do-it-yourself job to over $350 when a professional installs an expansion tank on a big residential water heater..

Average Cost of a Water Heater Expansion Tank Installation

You can expect to pay an average of $265 for a plumber to install an expansion tank on top of your current water heater if you choose one in your local region.
Included will be the tank, as well as all plumbing supplies, installation labor, and inspection services, if necessary.
Average Do It Yourself costs $55, whereas a typical contractor installs it for $265.
Installed costs range between $145 and $350 on average.
The most recent update was made on Wednesday, January 12, 2022.

Overview of Water Heater Expansion Tanks

Thermal expansion tanks are currently required by code for the majority of water heaters that use municipal water, according to the EPA.
This is due to new standards requiring the installation of backflow valves, which prevent water from your house from flowing back into the municipal supply.
In a closed system, pressure can build up as a result of the valve being closed.
Adding a new water heater to the system will be necessary if your water heater fails or if you sell your property.
In addition, the tank will protect your water tank, piping, and fixtures from the higher pressure that results from a closed system.

More information about water heater expansion tanks may be found in the section below.This cost estimate page, also known as a Costimate, includes all of the potential expenses associated with doing it yourself or hiring a professional.These include work cost variables, the cost of a retail expansion tank, and the cost of installation labor.Prices from a few more reputable cost estimator websites are also included in the table.You should be able to produce an accurate cost estimate for your project based on the information you have gathered.

Product and Installation Supplies Cost Details

Expansion Tank Price Factors

Thermal expansion tank costs for water heaters are governed by the parameters listed above. Who Installs the Tank — The labor costs associated with installing a water heater expansion tank account for the majority of the total cost. If you can do it yourself, you will save around 75% of the cost.
Tank Hold – A basic metal or plastic strap to support the weight of the tank is inexpensive and can be purchased for a few dollars. Steel brackets might be three to five times as expensive as the tank.
Cost of the Tank — There are only minor price differences between the 2-gallon and 5-gallon expansion tanks that are often used in household installations. Tank costs are also influenced by the quality of the tank.
In other cases, installation expenses may be less expensive than if the water tank is easily accessible and there is sufficient space to work. This is true when the water heater, for example, is located in a confined crawlspace or utility closet.

Cost of Expansion Tank Installation Supplies

The size of the tank required is determined by the capacity of the water heater and the pressure of the incoming water supply line
this is especially essential if you are using a well pump for your water supply. Because domestic water heaters range in size from around 30 to 100 gallons, most expansion tanks are less than 5 gallons in capacity. Look for a tank that is free of lead and is approved for use with potable water. Several online retailers, such as Supply House, include calculators or charts that illustrate what size tank you’ll require. Pro Tip: It is usually preferable to have a tank that is too large rather than one that is too little. Choose the bigger tank when in doubt between two different sizes. Prices for retail expansion tanks and installation supplies are shown below. The following items are required: $35 – $70 | Residential Expansion Tanks, 2.0 to 5.0 gallon capacity
$50 – $200 | Steel Tank Mounting Bracket
$6 – $12 | 30-foot roll of metal hanging strap
$15 – $25 | Pipe Cutter
$12 – $20 | 10″ to 14″ Pipe Wrench
$3 – $8 each | One 3″ Connector, $2 | Copper Tee
$6 – $8 | Short section of copper pipe
$2 – $4 | Tefl

About Water Heater Expansion Tanks

Here are some reasons why you might require a thermal expansion tank.
When water is heated, it expands.
For example, 40 gallons of water at 60 degrees Fahrenheit becomes approximately 40.6 gallons at 120 degrees Fahrenheit, resulting in tremendous pressure within the water tank and pipelines.
That additional capacity was typically pumped back into the municipal water system, which was an open system in previous water systems.
It’s not an issue.

By the early 2000s, most towns and counties mandated the installation of check valves on home water lines in order to prevent this from happening.These rules resulted in closed systems that prevented expanding water from finding a way out.The increased pressure frequently results in damage to the water tank, pipelines, and fixtures, among other things.″I have observed multiple instances where pipes or water heaters have split as a result of the pressure,″ says one plumbing contractor.The expansion tank is thus required if you have backflow prevention devices installed.″ Thus, when a water heater is linked to ″city water,″ installing a water heater expansion tank has become a frequent interior home repair job.

If you’re building a new house or having an inspector review the installation of your new water heater, you’ll almost certainly need to add an expansion tank in order to comply with local building codes.

Permits, Inspection, Related Costs and Installation Time

Permits and Inspection Cost

$0-$125 | $0-$125 The installation of an expansion tank is not subject to zoning regulations in the vast majority of counties. If the installation is part of a larger project, such as the installation of a new water heater, a permit may be necessary. If a permit is necessary, your local building department may inform you of the requirements.

Related Costs and Installation Time

From 0 to 125 dollars The installation of an expansion tank is not subject to any special regulations in most counties. It is possible that a permit may be required for the installation if it is part of a new water heater installation. If a permit is necessary, you should check with your local building department.

Most professionals can complete this project in a short period of time: Installing a Water Heater Expansion Tank will take about 1-2 hours.

DIY or Hire a Pro?

The installation of a water heater expansion tank is a relatively challenging task.
Here are the fundamental measures that will assist you in deciding whether to do it yourself or hire a professional.
First and foremost, you’ll require the equipment and supplies indicated in the Retail Costs section above.
The expansion tank is connected to the supply line coming in.
The majority of installers position them precisely above the hot water tank, resulting in an expansion tank that is parallel to the ground.

This is the quickest and most straightforward method of attaching a metal support strap.However, it is acceptable to place the water shut-off valve wherever along the supply line after it.The expansion tank can be hung vertically as long as it can be supported by the surrounding structure.Instructions for installing a thermal expansion tank are as follows:

Reduce water pressure by turning off the water and opening one of the spigots.
Disconnect electricity from the water heater and/or turn off the gas by turning the valve to the closed position (the handle will be perpendicular to the gas line).
Keep a pail nearby in case any water is accidentally left in the supply line. Cleanly cut the supply line using a pipe cutter for the cleanest result possible.
Installation of the copper Tee on the supply line, with or without soldering if necessary
Attach the thermal expansion tank to the chassis. Wrap the threads in 4-6 loops of pipe tape to hold them in place. Attach one end of the connection to the expansion tank and the other end to the Tee
thread the connector onto the expansion tank.
Metal strapping should be used to hold the weight of the expansion tank, with both ends of the strap being nailed to the floor joist above.
Start by turning on the cold water faucet. In the absence of any leaks, switch on the water heater and the gas, if it is a gas-fired water heater.

Observing a professional perform the task, as demonstrated in this video, will also help you prepare for the endeavor.

Water Heater Expansion Tank

Water expands when it is heated and, if it doesn’t have any place to go, this can create a dangerous situation.

Consider the inside of your home’s water heater with an excessive amount of pressure in it.
Previously, any pressurized water that accumulated would simply drain back into the city’s water distribution system.
However, this is not always feasible.
It’s likely that something is in place to prevent this release, but you’ll still need another safeguard, which brings us to the water heater expansion tank.
It is an additional small thank you that is attached to your water heater unit and serves the purpose of storing water.

It is intended to deal with the excess water that accumulates over time.If your home’s water pressure becomes excessive, the water will flow into your expansion tank rather than damaging your home’s plumbing valves, fixtures, and joints or causing a burst line that would cause irreparable damage and cost.When your water thermally expands, a water heater expansion tank minimizes undesirable increases in pressure.Water expands by roughly 2 percent as it heats up from 50° F to 120° F.You install the expansion tank down the line from the inlet valve that sends hot water into your home.

The tank has two sections that are separated by a rubber valve.
Water runs through the upper half, and there is pressured air in the bottom.
It’s this air pressure that permits the tank to absorb the excess pressure from your water heater, which keeps it away from your home’s other systems.

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Common questions about water heater expansion tanks include:

What is a check valve?

An example of a check valve is a device that prevents the backflow of thermally expanded water in the incorrect direction. If you don’t have an expansion tank, the extra pressure might put undue strain on your plumbing fixtures, including your water heater, shortening their lifespan.

Does the expansion tank have to be installed on the cold side?

We highly urge that expansion tanks be put on the cold line, downstream of the shutdown valve, even if they can be installed on the hot side.

Where should an expansion tank be installed in relation to the hot water heater?

The location of your expansion tank on your plumbing system is entirely up to you; it is not required to be built in close proximity to your water heater. The most frequent method of installation is to use a ″T″ at the cold water heater’s intake valve. However, it may be put anywhere along the cold inlet line in terms of functionality.

Can the expansion tank be installed at any angle? Pt. 1

It is possible to place the expansion tank at any angle.
This will be in contradiction with the information provided with any expansion tank purchased from a retail retailer.
According to the installation instructions that come with retail expansion tanks, the tank must be put in a hanging vertical position to function properly.
″Saddle Fitting″ is included with your retail expansion tank purchase when you purchase it from a retailer.
This eliminates the need for soldering and makes the process of installing an expansion tank simpler for the general public.

The saddle fitting is a basic clamp that attaches to the pipe.It also has threading that allows you to attach the tank to the saddle fitting.

Can the expansion tank be installed at any angle? Pt. 2

To begin, you must first create a tiny hole in the current pipe.
As a last step, the clamp should be tightened so that the hole lines up perfectly with the outlet for the expansion tank.
Despite the fact that this is a possibility, we do not advocate these fits for a variety of reasons.
Their reliability is questionable since they only allow the tank to be positioned in one position (vertical).
As an alternative, we propose that you solder the appropriate fittings into the system or that you use galvanized fittings.

How to know if you need a water heater expansion tank replacement

The lifespan of a typical water heater is estimated to be 10-15 years; however, your expansion tank may fail before this time.
First and foremost, effective installation of your expansion tank will guarantee that the air pressure in the tank is equal to the water pressure in your house, hence extending the life of the tank.
By examining your expansion tank on a regular basis, you may avoid a potentially costly mishap.
If you notice dripping water under the tank or near the fittings, it is possible that the valve has become clogged.
This can occur as a result of foreign matter, such as mineral deposits.

A pressure gauge, for example, should be installed to monitor the pressure in the tank.This will tell you if the tank is operating well or whether the diaphragm has been broken, which is important information.It is possible to replace a water heater expansion tank without having to replace the complete system in most cases.

Who needs a water heater expansion tank?

It is possible that thermal expansion will cause considerable pressure rises in your household plumbing system if you have a ″closed system,″ which means that your home is protected by a backflow preventer or other device that prevents your water from flowing back into the main water supply.
In these conditions, not only should you have a thermal expansion tank, but some towns may also compel you to have one.
Furthermore, if you have a closed system and do not install this protection, your water heater’s manufacturer may invalidate your guarantee.
If you have a tankless water heater, you won’t require an expansion tank because there is no tank and hence no buildup of pressure.
Similarly, if your property is served by an open water supply system, where excess water is recycled back into the municipal water supply, your home’s plumbing system will not be subjected to any additional pressure.

Cost To Install Water Heater Expansion Tank

Installing a water heater expansion tank can cost you money.
In addition, how much does a plumber charge to install a water heater are you interested in knowing?
Read on for thorough price information that will help you feel confident in your decision to purchase the water heater that is the greatest fit for your needs.
Installing a professional water heater expansion tank will cost you anywhere from $175 to $450, depending on your location.
In addition, how much does a plumber charge to install a water heater are you interested in knowing?

It is possible that the cost of installing a new thermal expansion tank will vary between $279 and $443.

The Tank Has Two Sections That Are Separated By A Rubber Valve.

Learn how much it will cost to complete your unique project needs. The price of a tank is heavily influenced by the size of the tank. It is possible that the cost of installing a new thermal expansion tank will vary between $279 and $443.

When Water Is Heated Inside Your Water Heater, It Expands.

Installing an expansion tank for a water heater Costs and guarantees associated with the installation It is possible that the cost of installing a thermal expansion tank will vary between $300 and $400. Is it required to build a water heater expansion tank in order to comply with the law?

The Total Cost To Install A Thermal Expansion Tank Is Usually Anywhere From $250 To $500.

The price of components such as pipe fittings, the cost of permits, and the cost of labor will all be included in the installation expenses for a water heater replacement project.
Read on for thorough price information that will help you feel confident in your decision to purchase the water heater that is the greatest fit for your needs.
When evaluating overall expenditures, it is important to take into account the cost of the expansion tank itself as well as the time it will take to build it.

The Cost To Install A New Thermal Expansion Tank Can Range From $279 To $443.

To put it another way, how much does it cost to construct a water expansion tank? A water heater expansion tank may be installed for between $200 and $500, but it can be as inexpensive as $40 if you do it yourself. If the excess volume has nowhere to go, it presses against the other side.

Installation Of The Unit Is Fairly Easy.

When water is heated from 50 degrees Fahrenheit to 120 degrees Fahrenheit, it expands by approximately 2 percent. As your water heater heats the water, the amount of the water increases. Suppose your water heater can store 50 gallons of cold water; after it is heated, the capacity increases to around 52 gallons.

Cost to Install a Hot Water Heater Expansion Tank

In most cases, the cost to build a hot water heater expansion tank is between $90 and $355.
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Even though you may not give much thought to how your house warms hot water on a daily basis, you need consistent, on-demand hot water for everything from having a shower to doing the dishes to washing your hands.
Thermal expansion tanks for hot water heaters can assist to safeguard your hot water heater and keep it from bursting while also guaranteeing you have access to hot water whenever you need it.

Installing a water heater expansion tank costs on average $220, according to the EPA.

How Much Does It Cost to Install a Hot Water Heater Expansion Tank Yourself?

For $40 to $200, you might save money on labor by installing a hot water heater expansion tank yourself if you are an experienced professional with substantial plumbing expertise.
In any case, hiring a professional for this task is typically a wise decision.
An incorrectly placed expansion tank might result in leaks, pipe breaks, and other problems in the future.
Talk to a water heater specialist to learn more about the many alternatives available.

Hot Water Heater Expansion Tank Cost Breakdown

The primary elements that determine the cost of installing a hot water heater expansion tank are the materials and labor involved in the installation.

Materials

Expansion tanks are available for purchase for between $40 and $200. In most cases, bladder or diaphragm type tanks are used, which have a rubber bladder that expands and keeps water separate from the main tank. Older tanks are frequently made of plain steel and do not have a bladder. Smaller, two-gallon tanks are less expensive than bigger, four-gallon tanks, which are more expensive.

Labor

You’ll also have to pay to have the hot water heater expansion tank installed by a qualified technician. This normally costs between $50 and $150 each hour of service.

FAQs About Hot Water Heater Expansion Tanks

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Do you have to replace expansion tanks at the same time as your hot water heater?

If you replace your hot water heater at the same time as your expansion tanks, you will save money. You may be able to use your expansion tank for six to twelve years or longer before needing to replace it. Hot water heater expansion tanks typically cost between $90 to $350, which is far less expensive than the cost of hot water tanks themselves, which average approximately $1,190.

Are hot water heater expansion tanks necessary?

While hot water heater expansion tanks are not required in many older homes, they are required in certain modern properties as well.
They are required by code in regions where there are backflow preventers or pressure regulators on the entering water line between the public water pipes and the water heater, and if there is a backflow preventer or pressure regulator on the outgoing water pipe.

How do hot water heater expansion tanks work?

It is possible for water to expand in a hot water heater, putting pressure on your hot water pipes and causing leaks or a rupture in your hot water tank under certain situations.
A backflow preventer, which keeps the hot water heater from diffusing pressure by releasing water back into the public water line, may cause pipe or water heater rupture owing to the pressure in a situation when the pressure is high.
In these situations, a hot water heater expansion tank serves as a pressure relief valve, preventing the hot water heater from bursting or leaking.
Hot water heater expansion tanks are typically only two to five gallons in size, making them an ideal choice for compact homes.

Are hot water heater expansion tanks required for warranty coverage?

Depending on the manufacturer of your water heater, you may be required to install an expansion tank in order to fulfill the requirements for warranty coverage. It is critical for buyers to study the fine print of the warranty to see whether or not an expansion tank is required.

How can I extend the life of my hot water heater?

An expansion tank can help you extend the life of your hot water heater and avoid costly repairs by increasing the capacity of the tank. Regularly drain and clean the water heater to ensure that it is operating at peak performance.

Water Heater Expansion Tanks

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What Is a Water Heater Expansion Tank?

It is important to note that the water heater expansion tank is a safety feature that minimizes the amount of pressure in your plumbing system.
These tanks are tiny tanks that are mounted on the water supply pipe that leads to your water heater and store water for the water heater.
In order to protect your plumbing and plumbing fittings from being damaged or overworked, water heater expansion tanks are installed in your water heater.
In order to do this, they take any extra water from a water heater while compressing air within the tank.
Understanding how a water heater expansion tank works is easier if you are familiar with the fundamentals of how a water heater operates.

This is what we’ll cover in this guide: how a water heater expansion tank works, how to assess if you need one, what to expect in terms of expenditures, and how to install one.

How a Water Heater Expansion Tank Works

Having a water heater expansion tank installed in a home is a simple but efficient backup device for protecting the piping from excessive pressure.
What would be the source of the extra pressure?
Starting with the water heater, which has the straightforward duty of heating water for usage in your house, everything follows.
As the temperature of the water in your water heater rises, it expands naturally.

Thermal Expansion

Thermal expansion is the term used to describe this phenomenon.
An electric water heater designed to store 50 gallons of cold water has a maximum capacity of 52 gallons once the water has heated to its boiling point.
In the event that the water heater cannot manage two more gallons of water volume, the surplus water will flow into your plumbing system.
The force of the water presses on the walls of pipes, joints and fittings, gradually weakening them.

Pressure Rises

Because your water heater is now dealing with a greater volume of water than it was when it was first installed, the pressure inside your pipes will increase. Similarly to how high blood pressure stresses your body, this pressure has the potential to harm your plumbing and plumbing fixtures over time. This pressure can even reach such a high level that it can cause a water heater to break.

Pressure Released Into Tank

In order to prevent this type of damage, the water heater expansion tank functions as follows: The tank is half-filled with water from your home’s water system at this point.
The remaining half of the container is filled with compressed air.
In the centre of the tank is a butyl rubber bladder, which allows the water in the tank to expand as it becomes warm.
Upon entering the tank, this surplus, expanded water from the water heater forces the rubber bladder into compressed air on the opposite side of the tank, causing even more compressed air to be trapped inside the tank.

Do You Need a Water Heater Expansion Tank?

In order to avoid this type of damage, the water heater expansion tank functions as follows: The tank is half-filled with water from your home’s water supply at the time of installation.
A pressurized air tank fills the remaining half of the container.
The butyl rubber bladder in the centre of the tank allows the water in the tank to expand as it heats up.
Upon entering the tank, this surplus, expanded water from the water heater forces the rubber bladder into compressed air on the other side of the tank, causing even more compressed air to be trapped within the tank.

You need a water heater expansion tank if:

The water heater you have is a typical tank-style water heater.
You’re connected to a closed-loop water distribution system.
It is required by your municipality or by the manufacturer of your water heater.
It is typical for the washers in your plumbing fittings to degrade more quickly than normal.
You notice that water is dripping from the relief valve on your water heater

You don’t need a water heater expansion tank if:

Using a tankless water heater, your system heats water on demand.
You’re connected to an open-loop water distribution system.

Without a water heater expansion tank to serve as a backup for your water heater and to handle the surplus water and pressure generated by the expansion, the water will either run back into the municipal water supply or find its way into your plumbing system. This is decided by whether or not you have an open-loop or closed-loop water supply system installed in your home or business.

Open-Loop Water Supply Systems

If your home is connected to an open-loop water supply system, any extra water (resulting from thermal expansion) has somewhere else to go — it simply drains back into the municipal water supply. This does not put any more pressure or strain on the piping in the home, so you won’t need to install a water heater expansion tank to accommodate the increased demand.

Closed-Loop Water Supply Systems

Typically, a one-way valve (also known as a backflow preventer, check valve, or pressure-reducing valve) is installed in the water supply to prevent water from flowing back into the municipal supply. Due to the fact that there is nowhere else for the extra water to go, it enters the plumbing system and increases the pressure.

Telling the Difference Between the Two

Calling a plumber is the most reliable approach to find out for certain.
If you have a closed-loop system, they’ll inspect your plumbing and look for particular backflow prevention valves that signal it.
It is from there that they will be able to propose the appropriate size of water heater expansion tank for your water heater and will also be able to install the tank for you.
You may be required to have an expansion tank if you are on a closed-loop water supply system because of the higher risk of excess pressure in your plumbing system.
To find out if a water heater expansion tank is necessary in your area, you can check with the local government.

Because, if something goes wrong with your water heater, it might result in an expensive error that you will regret.Several manufacturers will not respect a warranty if an expansion tank is not put on a closed-loop water supply system, according to Consumer Reports.As a result, you’d need to have one installed in order to avoid having your warranty terminated.

Water Heater Expansion Tank Costs

Following your determination of whether or not you require a water heater expansion tank, the following step is to estimate the estimated cost of installation.
Expansion tanks for water heaters are not prohibitively costly.
High-end versions, on the other hand, might be rather expensive.
Water heater expansion tanks are available for purchase for anywhere from $40 to $200, or an average of $120 on the market.
The price varies depending on the size of the tank.

A 2-gallon water heater expansion tank is used by the majority of residential households with 40- to 50-gallon water heaters on average.The reason for this is that 50 gallons of hot water will expand by approximately 2 gallons, making this tank the ideal size for the majority of households.The cost of hiring a plumber to install the tank will be a bit more than the expense of doing so yourself, but it will be well worth it in the long run.Installing a professional water heater expansion tank will cost you anywhere from $175 to $450, depending on your location.It is possible to save money on labor expenses if you have a plumber install a water heater expansion tank at the same time as a water heater is being installed.

Installing a Water Heater Expansion Tank

Adding an expansion tank to a water heater is regarded to be a relatively challenging do it yourself job.
The process includes many steps, a few equipment and components, and previous knowledge dealing with your home’s plumbing system.
If you have no prior expertise dealing with plumbing or have never attempted a project like this, we recommend that you hire a professional to do the installation.
It’s usually beneficial to have a basic understanding of the installation procedure so you’ll know what to expect when it happens.
An experienced plumber will do the following tasks while installing a water heater expansion tank:

Cold water supply pipe that leads to the water heater is spliced together
• Setting up an elbow fitting above the water heater
• Setting up the water heater expansion tank

Installation is not as straightforward as it appears. Installing a water heater expansion tank is done in the following manner by a plumber.

Close the Valves

Initial steps will include shutting down the water valves as well as disconnecting the hot and cold water lines that are attached to the water heater.
The cold water entry port on the water heater will be connected to a dielectric union by means of a dielectric union connector.
The bottom threads of the dielectric union should be covered with pipe sealing tape before being screwed onto the cold water entry port with channel lock pliers or a pipe wrench.
IMPORTANT:

Wrap the Threads

Pipe sealing tape will now be applied to the top threads of the dielectric union as well as the bottom threads.
A female threaded copper adapter will be added to the top threads of the union and then fastened using channel lock pliers or a pipe wrench once more to complete the installation.
At this stage, a tee fitting will be attached to the pipeline.
To begin, a small length of copper pipe will be linked to the female threaded copper adapter on the water heater’s water supply line.

Secure the Tee

With the use of sweat-soldering or push-fit connections, the teer fitting will be attached to the copper pipe.
In order to guarantee that there is enough space for the expansion tank, it should be put approximately 12 inches above the water heater.
It will be necessary to solder or push-fit another small piece of copper pipe (no more than 6 inches in length) into the side outlet of the tee fitting that has just been installed.

Attach the Expansion Tank

An additional copper female threaded adapter will be fitted at the end of this pipe to complete the system.
It is now possible to install the water heater expansion tank.
The threaded fitting on the new expansion tank will be sealed using pipe sealing tape.
After that, it will be threaded by hand onto the female threaded adapter that was just installed, and the process will be repeated.
At the end of the process, the cold water supply line will be connected to the top, open outlet of the tee fitting.

This may be accomplished by a plumber using copper flex line or rigid pipes.All of the hot water pipes and water heaters will be reconnected, all of the water valves will be opened, and the entire system will be checked.

Should a Pro Install Your Water Heater Expansion Tank?

After going through the processes for installing a water heater expansion tank, it is clear why the majority of homeowners choose to hire a plumber to complete the project.
It is a moderately difficult undertaking that necessitates the use of several fittings, specific equipment and materials, and meticulous accuracy in order to prevent causing harm to the plumbing.
Lies, increased pressure in plumbing, stripped threads, overtightening, and other issues might come from a clerical error during the installation process.
It is preferable to hire a professional to complete this process rather than take the chance of doing it yourself.

So, What Is a Water Heater Expansion Tank?

Water heater expansion tanks are an absolutely necessary safety precaution for every residence that uses a closed-loop water supply system.
If you have a classic tank-style water heater, it’s a good idea to consider installing one.
Perhaps your municipality demands it, or you may have just seen water spilling from the relief valve on your water heater.
In any case, expansion tanks are a cost-effective solution that may help you avoid costly damage to your home’s plumbing fittings and water heater in the future.

Hot Water Heater Expansion Tank Cost

Standard tank water heaters can cause stress on your pipes as a result of the typical thermal expansion that occurs over the course of the heating process.
In order to do this, you may want to think about the worth of a water heater expansion tank.
These goods, which are sometimes referred to as thermal expansion tanks, can provide a variety of advantages to your area.
At the same time, it is critical to thoroughly investigate your possibilities.
Despite the fact that pressure damage to your plumbing system might result in a variety of short- and long-term problems, you will want to understand everything you can about hot water heater expansion tanks.

This would undoubtedly cover the topic of how much it costs to install an expansion tank for a hot water heater.

Do I Need A Hot Water Heater Expansion Tank?

In the case of on-demand tank-less water heaters, the value of a hot water heater expansion tank is not taken into consideration.
Those who use tank-style heaters must take into consideration the possibility of pressure damage to the piping system.
This component, which serves as an overflow receptacle, will operate to collect extra water volume generated by your tank water heater while it is in operation.
When water is heated, it expands as a result of thermal expansion.
The importance of this is something that should not be overlooked.

For example, when the cold water in a fifty-gallon water heater is heated, it will most likely expand to fifty-two gallons after going through the heating process.This is when the strain can begin to manifest itself, and it is at this point that the hot water heater expansion tank will show to be really beneficial.Because water can be pushed back with relative ease in open systems, there is rarely a concern about expanding water in closed systems.Closed water delivery systems, on the other hand, do not have the same advantages.When attempting to return water to the city through these one-way valves, they might encounter several difficulties.

The installation of one of these expansion tanks is required in most cities for residential closed plumbing systems.
Consider the following considerations when determining the cost of your project.
Starting at around forty dollars, prices can grow significantly from there.
The top-of-the-line pricing for these tanks is often in the neighborhood of two hundred dollars.
The amount of money you may anticipate to spend on one of these tanks will be mostly determined on the size that you require.
Finally, if you want to employ a professional to install your water heater, make sure to discuss the possibility of having an expansion tank put as well as the water heater.

Cost to Install a Water Heater Expansion Tank

Excessive pressure on your water heater and pipes may be prevented by installing an expansion tank in the tank of your heater.
Whenever the water tank’s pressure becomes too high, it automatically accepts overflow water from the tank.
Homes with closed-system water heaters, which are equipped with pressure limiting valves or backflow preventers, are required to have an expansion tank installed.
The good news is that the expense of installing a water heater expansion tank is not prohibitively expensive.
If you do it yourself, you may save up to $400 on the installation of a water heater expansion tank, which can be as little as $40 if you hire a professional.

The water heater expansion tank itself ranges in price from $40 to $70, depending on the size and material used to construct it.You’ll also need to budget for mounting materials, extra pipes, and other supplies, which may be anywhere from $140 to $350 per item.If you are confident with your plumbing abilities, you may save a lot of money by performing this as a do-it-yourself project.It is more likely that the total cost will be closer to $500 if you hire a professional to do the installation for you.Do you require the installation or replacement of a water heater?

Get free, no-obligation quotations from professional contractors in your area.
LOCAL CONTRACTORS CAN BE FOUND

Adding Up The Cost To Install A Water Heater Expansion Tank

When calculating the overall cost of installing a water heater expansion tank, it is necessary to include more than the cost of the tank itself.
You should also take into consideration any additional materials that may be required for the project.
Furthermore, if you lack the requisite plumbing expertise, you will need to employ a professional, which will result in additional labor expenditures.
The following is an outline of the several elements that influence the cost of installing a water heater expansion tank.

The Cost Of The Water Heater Expansion Tank

Expansion Tank Size	Average Price
2-gallon	$20 – $40
4-gallon	$50 – $70

The most popular sizes for water heater expansion tanks are 2, 2.1, 4.5, and 4.8 gallons.
Other sizes are available upon request.
A 3-gallon tank is less common, but you should be able to get one if you look around a little for it.
Expansion tanks are not need to be of a specific size because they are only used to hold overflow from your water tank.
You will be alright as long as your expansion tank is large enough to accommodate the surplus water.

It is quite simple to establish what size you require if you do not know what you require.You may read on for additional information on how to choose the appropriate size water heater expansion tank for your needs by scrolling down.Items that are more durable, such as steel tanks, as well as products from firms that have longer warranties, will be more expensive.In any case, you can see that all of these expansion tanks are really reasonably priced.As a result, you won’t be shocked to hear that labor constitutes the vast bulk of the project’s expenses.

Labor Costs To Install A Water Heater Expansion Tank

Contractor	Labor Rates
Licensed Plumber	$75 – $150
Handyman	$60 – $100

Based on what you’ve seen, the hourly charge for installing your expansion tank will most likely be in the neighborhood of $100.
The labor costs associated with hiring a professional to install your expansion tank will account for the vast bulk of the total cost of this job.
If nothing else, it will almost certainly end up being more expensive than the tank itself.
The time it will take to complete the installation of a water heater expansion tank is estimated at four hours.
Labor expenses are one of the reasons why skilled do-it-yourselfers may decide to take on the job themselves.

You may save a significant amount of money in this manner, with the project cost being reduced by more than half.It is suggested, however, that you have some prior plumbing knowledge before attempting this kind of repair.Hiring a professional plumber is recommended if you do not have prior plumbing knowledge or the necessary instruments for the work.The time required to finish this project is estimated in the table below.Fortunately, as you can see, it is a relatively straightforward installation for a professional, which means that the labor cost would be kept to a minimum.

Installer	Project Completion Time
Professional Plumber or Handyman	1 – 2 hours
DIY Enthusiast (You!)	2 – 4 hours

Additional Materials: Cost To Install A Water Heater Expansion Tank

Hopefully, the cost estimates provided in the preceding charts will assist you in better understanding the scope of your expansion tank installation project.
However, there are a few extra fees that you should be aware of before moving further.
You will have to pay for extra materials and tools if you do not already have them, in addition to the tank and labor fees.
This is a critical component to consider before beginning any project of this nature.
If you’re a frequent DIY enthusiast, it’s probable that you already have all of the required equipment on hand.

If you have never done any plumbing work before, you will need to purchase a few tools in order to finish this job successfully.These costs are little in comparison to the entire cost of your project, but they will add a significant amount to the overall cost of your project in terms of percentage.You will, however, need to purchase the goods that are required.

Additional Materials	Cost
Tank Mounting Brackets	$50 – $200, depending on the material
Hanging Strap (as an alternative for mounting)	Around $10
Necessary Piping	Around $15
Tools Needed	Cost
Pipe Cutter	Around $20
Pipe Wrench	Around $15
Soldering Kit	$30 – $50

A contractor would charge you for the additional supplies, but not for the tools, which is understandable.
It is therefore possible that employing a professional plumber is preferable if you have never performed plumbing repair before.
Not only will you save money on tools, but you will also be able to have confidence in the quality of the finished product.
You should be able to estimate the entire cost of your project based on the information you’ve gathered so far.
Hopefully, you can use this information to determine whether or not hiring a professional is a good investment for you.

Continue reading to find out if an expansion tank is a good investment for you, as well as for others.

What Is The Purpose Of A Water Heater Expansion Tank?

The expansion of water as it warms up is something you might remember from high school chemistry class..In a closed container, such as a water heater, this results in increased pressure, which can put additional strain on the tank and pipes.The overflow of expansion tanks is linked to your tank in order to prevent it from damage and to offer a longer shelf life for your product.Expandable tanks are only required by building rules in specific situations and for specific purposes.The hot water from a conventional water heater may flow freely into the surrounding pipes, allowing the pressure to be dissipated.As a result, expansion tanks are no longer required, however some individuals still keep them on hand for safety reasons.

Furthermore, tankless water heaters, which operate by pushing water through burners on demand, would never experience this difficulty.Because the expansion tank is merely intended to contain overflow, it is not necessary for it to be very huge.As you can see in the table below, they are a reasonably priced option.If you are unclear whether or not you require an expansion tank, and if so, what size you require, you may consult with your plumber for advice.

What Size Water Heater Expansion Tank Do I Need?

A normal family home will not require an expansion tank larger than 2 gallons in capacity. However, it is a good idea to conduct your homework and make certain that you choose the suitable size water heater for your needs. Listed below are the steps you may take to determine your suitable tank size, as well as an example of a chart to assist you.

Determining Your Water Heater Expansion Tank Needs

The size of the expansion tank you require is determined by two things.These are the dimensions of your water heater and the pressure of the water flowing through your plumbing system.To figure this out for yourself, first calculate the capacity of your water heater so that you can purchase the appropriate size.It should be clearly marked on the tank, or you may look up the manufacturer’s information on the internet.You may use a pressure gauge on any faucet to determine the water pressure in your system, and this is the second step.Simply run the water a few times during the day to ensure that you get an average reading on the temperature.

Alternatively, if you do not have a gauge, you can contact your local water provider to find out what you need.

Recommended Water Heater Expansion Tank Sizes

As soon as you have this information, you may use this chart to determine the correct size of the water heater expansion tank to be installed. Please keep in mind that the recommended expansion tank sizes are only estimates. As previously stated, a 2.1-gallon tank (instead of 2 gallons) or a 4.5-gallon tank (instead of 4 gallons) are acceptable alternatives.

Water Heater Size	Water Pressure	Expansion Tank Size
40 – 60 gallons	40 – 50 psi	2-gallon
40 – 60 gallons	60 – 80 psi	3-gallon
60 – 80 gallons	40 – 50 psi	3-gallon
60 – 80 gallons	60 – 80 psi	4-gallon

A normal residential, family house will have a water heater tank that holds 40, 50, or 60 gallons of water.A 2-gallon expansion tank will enough for a tank of this size with a typical pressure of 40 psi or 50 psi, depending on the manufacturer.A 4-gallon expansion tank is recommended for water tanks having a capacity of up to 80 gallons and a supply pressure of 80 psi or higher.In light of their low cost, you should feel free to get a size larger than you need just to be on the safe side.If you are unclear about the size you need, there is no harm in purchasing a 4-gallon tank that is little too large.In addition, you may always chat with or seek guidance from your local plumber for more assistance.

Do you require the installation or replacement of a water heater?Get free, no-obligation quotations from professional contractors in your area.LOCAL CONTRACTORS CAN BE FOUND

How much does it cost to install a water heater expansion tank?

Asked in the following category: General The most recent update was on the 2nd of May, 2020.Prices for water heater expansion tanks begin at approximately $40 and can reach around $200; the price is mostly determined by the size of the tank.A basic 2-gallon tank will suffice for the majority of household setups that use 40- or 50-gallon water heaters.The tank is quite simple to install because it uses a standard 3/4-inch threaded connection.Costs and Warranties Associated with the Installation A thermal expansion tank installation might cost anywhere between $300 and $400 dollars.Most of the time, the cost of the thermal expansion tank is included in the price of a new water heater installation.

In addition, how much does a plumber charge to install a water heater in your home?It costs roughly $1,100 to purchase and install a hot water system, but if you already have one and simply want a professional to put it up, you can expect to pay approximately $181.29 for labor.However, the cost of installation might still be significantly greater, particularly if more plumbing is required.Is it necessary to build an expansion tank on a water heater in this case?Having an expansion tank built on your home’s water supply line is usually suggested if you have a ‘closed-loop system,’ which can be created by any type of check valve or pressure regulating valve that has been installed on your water supply line.

High water pressure in your home is sometimes compared to having high blood pressure, which is a typical comparison.
When buying a water heater from Home Depot, how much does it cost to have it installed?
The Home Depot provides both classic water heater tanks and contemporary tankless water heater units, both of which may be fueled by either natural gas or electricity.

Depending on your choice, the typical cost of water heater installation is between $1,000 and $3,000 (including installation).

Do You Need a Water Heater Expansion Tank?

What Is a Water Heater Expansion Tank?

Closed Water Supply Systems

How a Water Heater Expansion Tank Is Installed

$145 – $350, Installed

Average Cost of a Water Heater Expansion Tank Installation

Overview of Water Heater Expansion Tanks

Product and Installation Supplies Cost Details

Expansion Tank Price Factors

Cost of Expansion Tank Installation Supplies

About Water Heater Expansion Tanks

Permits, Inspection, Related Costs and Installation Time

Permits and Inspection Cost

Related Costs and Installation Time

DIY or Hire a Pro?

Water Heater Expansion Tank

Water expands when it is heated and, if it doesn’t have any place to go, this can create a dangerous situation.

Share & Save this graphic to refer back to!

Common questions about water heater expansion tanks include:

What is a check valve?

Does the expansion tank have to be installed on the cold side?

Where should an expansion tank be installed in relation to the hot water heater?

Can the expansion tank be installed at any angle? Pt. 1

Can the expansion tank be installed at any angle? Pt. 2

How to know if you need a water heater expansion tank replacement

Who needs a water heater expansion tank?

Cost To Install Water Heater Expansion Tank

The Tank Has Two Sections That Are Separated By A Rubber Valve.

When Water Is Heated Inside Your Water Heater, It Expands.

The Total Cost To Install A Thermal Expansion Tank Is Usually Anywhere From $250 To $500.

The Cost To Install A New Thermal Expansion Tank Can Range From $279 To $443.

Installation Of The Unit Is Fairly Easy.

Cost to Install a Hot Water Heater Expansion Tank

How Much Does It Cost to Install a Hot Water Heater Expansion Tank Yourself?

Hot Water Heater Expansion Tank Cost Breakdown

Materials

Labor

FAQs About Hot Water Heater Expansion Tanks

Do you have to replace expansion tanks at the same time as your hot water heater?

Are hot water heater expansion tanks necessary?

How do hot water heater expansion tanks work?

Are hot water heater expansion tanks required for warranty coverage?

How can I extend the life of my hot water heater?

Water Heater Expansion Tanks

Jump to:

What Is a Water Heater Expansion Tank?

How a Water Heater Expansion Tank Works

Thermal Expansion

Pressure Rises

Pressure Released Into Tank

Do You Need a Water Heater Expansion Tank?

You need a water heater expansion tank if:

You don’t need a water heater expansion tank if:

Open-Loop Water Supply Systems

Closed-Loop Water Supply Systems

Telling the Difference Between the Two

Water Heater Expansion Tank Costs

Installing a Water Heater Expansion Tank

Close the Valves

Wrap the Threads

Secure the Tee

Attach the Expansion Tank

Should a Pro Install Your Water Heater Expansion Tank?

So, What Is a Water Heater Expansion Tank?

You Might Also Like:

Hot Water Heater Expansion Tank Cost

Do I Need A Hot Water Heater Expansion Tank?

Cost to Install a Water Heater Expansion Tank

Adding Up The Cost To Install A Water Heater Expansion Tank

The Cost Of The Water Heater Expansion Tank

Labor Costs To Install A Water Heater Expansion Tank

Additional Materials: Cost To Install A Water Heater Expansion Tank

What Is The Purpose Of A Water Heater Expansion Tank?

What Size Water Heater Expansion Tank Do I Need?

Determining Your Water Heater Expansion Tank Needs

Recommended Water Heater Expansion Tank Sizes

Related Questions

Can you install a water heater expansion tank upside down?

How long will my water heater expansion tank last?

Do you have to replace the expansion tank when you replace the water heater?