How To Replace Gas Water Heater

DIY Water Heater Installation

Time A busy day of work Complexity IntermediateCost$101–250


Time A full day’s worth of activities Complexity IntermediateCost$101–250

Tools Required

  • Water and gas piping
  • Discharge pipe
  • Fittings
  • Pipe thread compound
  • Pressure relief valve
  • Solder. Ventilation pipe and connections
  • Pressure relief valve.

Getting Started Installing Your New Hot Water Tank

In this example, we’re swapping out a natural gas water heater for an electric water heater. The processes for replacing a propane water heater are identical to those for replacing an electric water heater, and the steps for replacing both are comparable. In any event, when it comes to arranging a water heater replacement, it’s best to be cautious. Call your local department of inspections and inquire as to whether or not you require a permit. Also, be certain that your work is checked by a plumbing or electrical inspector.

Plumbers normally charge between $45 and $65 per hour and can complete the installation of a water heater in a day or as little as 6-8 hours.

Gas water heaters with particular venting systems are also available, although they are more costly.

Water Heater Parts and Breakdown

  • Fire pipe, cold water shutoff valve, draft diverter, temperature and pressure relief valve, overflow pipe, hot water outlet, anticorrosion anode rod, dip tube, elements, insulation, drain valve, thermostat or control valve, burner, thermocouple, gas supply valve, and more.

When to get a new water heater

When the tank of your water heater leaks, your water heater is out of commission. An indication that your water heater needs to be replaced is a gradual drop beneath the unit, which commonly manifests itself as a trail of discolored water. This indicates that the steel tank has corroded through and will be unable to be repaired. Other symptoms, such as little or no hot water, are typically indicative of other water heater repair issues that may be resolved by you. If you notice a drop, make a plan to get the water heater replaced as soon as possible.

  • New water heaters are sent with detailed installation instructions as well as several cautions to ensure that the gas, electrical, and other connections are handled properly.
  • However, you should be aware that you will be dealing with natural gas, propane, or electricity, all of which are potentially harmful.
  • And, after you’re finished, get your work examined.
  • You should explain to your local plumbing inspector how you want to install your new connections, including the sorts of materials you intend to use.

Figure A: Gas Water Heater Details

Mr. Fix-It-Up-For-The-Family See the Additional Information section at the end of this article for instructions on how to print this image.

Figure B: Connections for Steel and Plastic Pipe

Mr. Fix-It-Up-For-The-Family Water supply pipes in many residences are made of galvanized steel or polyvinyl chloride (CPVC). Replaceable galvanized steel pipes are quite difficult to come by. Using our photo series, we propose that you return the pipes to their original tees and screw on a plastic-lined galvanized nipple before finishing the connections with copper. Plastic tubing should be kept at least 6 inches away from the vent and tank due to the possibility of heat accumulation. Using a specific connection, you may make the transition from plastic to copper.

Flexible copper connectors are less difficult to install than solid copper connectors, which is especially important when the existing pipes and tank inlets do not match up.

However, they are not permitted by all local ordinances. If yours does, take extra care not to pinch or kink them when handling them. It’s possible that you’ll receive a leak.

Project step-by-step (12)

Turn off the gas to the water heater by twisting the shutdown valve a quarter turn away from the water heater. When the handle is turned off, it should be at a straight angle to the pipe. Also, turn off the main water supply and drain the pipes by opening a tap on the lowest floor of the building. Step No. 2

Drain the water in the tank

Connect a garden hose to the drain valve and use it to drain the water that has accumulated in the tank. The water will be boiling hot, so proceed with caution! With a pair of wrenches, disconnect the gas line at the neighboring union and remove the pipe from the gas control valve with a pipe wrench to complete the task.

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Using a garden hose, connect the drain valve to the tank’s remaining water and empty it. Water will be boiling hot when you turn on the water heater. Unscrew the pipe from the gas control valve with a pipe wrench and disconnect the gas line at the adjoining union with a pair of wrenches after it has been disconnected.

Cut off the water lines

The vent pipe should be moved to the side once it has been unscrewed from the vent hood. After that, using a tube cutter, cut the hot and cold water lines. For galvanized pipe, remove the unions and, if you have them, remove the nuts on the flexible connections as well. Move the old water heater to the side of the room. Step number four.

Attach the relief valve

Teflon tape should be used to seal the threads of the new temperature and pressure relief valve (three turns). With a pipe wrench, tighten it inside the tank until it is completely sealed. Glue a copper discharge pipe to the wall (see Fig. A for routing details). Step number five.

Attach pipe assemblies

Solder fresh copper adapters to 6-in. lengths of 3/4-in. copper pipe and screw the assemblies into the hot water outlet and cold water inlet ports on the top of the tank’s tank’s tank’s tank. Make use of short, plastic-lined nipples to protect your pipes from galvanic corrosion, especially if you have hard water or if they are required by your local building standards. Step 6: Organize your thoughts and feelings about the situation.

Attach the water lines

Slide the new water heater into position, recut or lengthen the old tubing to connect it to the new, and solder the tubing together using copper slip couplings to complete the installation. If the tubing does not line up properly, use pairs of 45-degree elbows to adjust the alignment of the lines. Step 7 – Organize your time and resources.

Reattach the vent

Reconnect the vent if necessary. Place it securely over the draft hood and secure it with three 3/8-in. No. 6 sheet metal screws to hold it in place. Prepare the holes by drilling them beforehand. Before turning at the first elbow, the vent should rise at least 12 inches vertically from the floor. In this eighth step, you will learn how to use a comma to separate the words “and” and “and not.”

Use two wrenches to attach the gas line

Reconnect the gas line if necessary. Pipe joint compound should be applied to the threaded ends before screwing the first nipple into the gas valve. To minimize straining the valve, use two pipe wrenches at the same time. Reassemble the remaining nipples, concluding with the union at the end of the process (Photo 2). Then, in order to fill the tank, perform these four steps: To check for leaks, perform the following steps: (1) cut off the main water valve; (2) re-connect the water at the main shutoff; (3) open the cold-water valve on the water heater (but do not close it); and (4) turn on a nearby hot-water faucet until water flows out.

Check for backdrafting

The majority of water heaters rely on a natural airflow to carry combustion emissions up the chimney and out of the building. If the draft does not operate, the fumes, which may contain lethal carbon monoxide, will be released into your home and cause you to become sick. Check the draft when you’ve finished installing everything. Close all of your external doors and windows, and put on the exhaust fans in your kitchen and bathroom. Continue to run a hot water faucet until you hear the gas burner in your water heater come to life.

Ideally, the smoke should be drawn upward through the vent pipe.

Turn off the gas supply to the water heater and contact a certified plumber to diagnose and remedy the problem.

Check for leaks

Check for leaks by turning on the gas and squeezing a 50-50 combination of dishwashing liquid and water over the connection points. If there are bubbles in the mixture, you have a leak. Joints that are leaking should be tightened or reconnected. When you’re finished, wipe the joints down with a clean cloth. Make an appointment with the plumbing inspector to have them go at your work. Follow the how-to instructions that are included with the photographs to ensure that the connections are secure.

Light the pilot light

The pilot light should be turned on in accordance with the manufacturer’s instructions. (When using an electric water heater, turn on the electricity at the main panel after your work has been checked by the electrical inspector). Once you’ve finished, adjust the temperature to 120 degrees Fahrenheit according to the installation instructions. The pilot light in the new water heater should be lit, then the temperature setting should be adjusted.

Installation Details for Electric Water Heaters

At your main electrical panel, turn off all power to your water heater, then turn it back on. After that, empty the water heater in the same manner as you would a gas water heater. As soon as the water heater has been drained, separate the electrical wires from the screw terminals under the access panel, which is normally situated towards the top of the water heater. To handle all of the electrical wiring, you should engage an electrician if you don’t have any prior knowledge with it. When it comes to wiring the new water heater, follow the manufacturer’s instructions.

  1. x 4-in.
  2. metal electrical box on the wall or ceiling near the water heater, route the old wires to the box, and then run a new length of armored cable or electrical conduit to the water heater to complete the installation.
  3. The circuit should also have a shutdown switch that is visible from the vicinity of the water heater.
  4. You’ll almost certainly require a permit.
  5. Aluminum wire needs specific care and handling.

If you have aluminum wire, you should choose a qualified professional who is experienced in working with it. This wiring is a dull gray color, rather than the drab orange color that is characteristic of copper wiring. ‘Step 12’ is the final step in the process.

How to Dispose of a Water Heater

In this video lesson, Jeff Gorton, an editor at The Family Handyman, will show you how to remove and dispose of a water heater in the proper manner. He will also demonstrate a simple method of transporting a water heater out of your home, even if you are working on your own.

These tips will make your work go faster and easier:

  • A water heater will be removed and disposed of in our video lesson, which will be presented by Jeff Gorton, an editor at The Family Handyman. Also demonstrated will be a simple method of transporting a water heater out of your home, even if you are working alone at the time.

Additional Information

Water Heater Maintenance: How to Extend the Life of Your Hot Water Heater How to Repair a Leaking Water Heater Water Heater Installation Instructions on how to replace the TPR valve on a water heater Solar Water Heater Made at Home How to Repair or Replace Water Heater Dip Tubes That Are Defective How to Flush a Water Heater (with Pictures) The Process of Purchasing a New Water Heater 7 Myths About Tankless Water Heaters That You Should Never Believe The Advantages and Disadvantages of Tankless Water Heaters

How to Install a Gas Water Heater

You may save money on your utility expenses by installing a new gas water heater. How to do it is demonstrated in our video and step-by-step tutorial. Please keep in mind that product pricing, availability, and item numbers may differ from market to market.

Before You Begin

Before committing to a full replacement, conduct a brief maintenance inspection to determine the root cause or the necessity for a new water heater. If you follow the methods outlined below and find that replacement is required, make sure to verify your local building codes before proceeding to confirm that you are in compliance. And, if you’re still not sure, consult with a professional.

Check Water Pressure

The water pressure in your house is critical for all of the equipment that use water. A decrease in pressure reduces the stress placed on plumbing systems and helps to increase the lifespan of appliances and fixtures. When it comes to pressure monitoring, you might want to think about using an inline pressure gauge.

Add an Expansion Tank

To install an expansion tank, follow the instructions outlined below.

Removing the Old Gas Water Heater

Installing a new gas water heater is simple if you follow these procedures. Exercise caution when unpacking and unwrapping your new water heater to avoid causing damage to it. Water heaters are heavy; while transporting the appliance, enlist the assistance of a friend, an appliance dolly, and/or a hand truck.

Preventing Scalds

Installing a new gas water heater is easy if you follow these procedures. Exercise caution when unpacking and unwrapping your new water heater to avoid causing damage to the unit. A helper, an appliance dolly, and/or a hand truck should be used while transporting a water heater because the item is very heavy.

See also:  How Big Is A Water Heater Explosion?

How to Install or Replace a Gas Water Heater

Overview of the Process of Installing a Water Heater

  • Step 1: Measure and prepare the available area. Water should not be turned on in Step 2. Step 3: Empty the tank. Disconnect the gas and water lines in the fourth step. Removing the overflow pipe and the pressure release valve is the fifth step. Step 6: Vacuum the floor
  • Step 7: Attach the flue hat. Step 8: Solder the gas line together. Step 9: Turn on the pilot light.

There are few things that are more frustrating than a broken water heater. When there is no hot water, there are no clean dishes or clothing to wash, and you have to take chilly showers. You should consider replacing your water heater if you’re having troubles with your current unit. DIYing the replacement of your air conditioner might save you money. This Might Also Be of Interest to You: What is the approximate cost of repairing or replacing your water heater? When shopping for a new water heater, it is important to understand that water heater installation is not a task for inexperienced individuals.

Furthermore, if you make a mistake throughout the procedure, you might do harm to your home.

Knowing how to connect the water and gas lines to the new heater, as well as how to start the pilot light, will be necessary. If you think you’re up for it, continue reading.-

Can I Install a Gas Water Heater Myself?

A faulty water heater is one of the most frustrating things that may happen in your home. When there is no hot water, there are no clean dishes or clothing to wash, and there are no hot showers for you to take either. You should consider replacing your water heater if you’re having troubles with your current one. By changing your unit yourself, you can save some money. Additionally, you may be interested in the following information: Repairing or replacing your water heater can be a costly endeavor.

If you don’t know what you’re doing, you run the risk of injuring yourself while attempting to install the product.

Identifying the type of gas water heater you have, selecting a new unit, and removing the old unit are all steps in the replacement process.

Continue reading if you’re up for it.-

What Kind of Water Heater Do I Own?

To correctly install a new water heater, you must first remove the old one that is currently installed. In order to remove a gas water heater, you will have to put up more work than if you are using an electric water heater. Electric water heaters are distinguishable from their gas counterparts by the fact that they are powered by a cord and are not linked to a gas line. Because each water heater is slightly different, it’s a good idea to make a note of the make and model of your water heater as well.

Choosing the Right Water Heater

Pick whether you want to fuel your water heater with natural gas or electricity, and then decide whether you want a tank-style water heater or a tankless water heater. The choice between gas and electric will be the more significant one since it will have the most influence on your monthly energy bill and maintenance expenditures.

Electric Water Heaters

You must first determine whether your water heater will be powered by electricity or by natural gas, and then determine whether or not you want a tank-style water heater. The choice between gas and electric will be the more essential one, as it will have a greater influence on your monthly energy bill and maintenance costs than the other options.

  • Electric water heaters require less maintenance than gas water heaters since they are not linked to a natural gas line. As a result, there is no danger of gas leaks, which can result in explosions or carbon monoxide poisoning. When it comes to the water heater itself, you will save money. Power, on the other hand, is more expensive than natural gas, therefore you will see an increase in your electricity costs as a result of this saving. If you lose power, you will be without hot water for a period of time since the water heater requires electricity to work. Compared to its gas-powered equivalents, electric water heaters heat water at a slower rate. Electric water heaters with high efficiency are not available on the market.

Gas Water Heaters

Installing a gas water heater will necessitate the use of more advanced skills and will take longer than installing an electric water heater. If you’re thinking about installing a gas water heating system, there are some advantages and disadvantages to consider. These include:

  • Natural gas is significantly less expensive than electricity. In order to save money on your utilities, this is the best option for you
  • Units fuelled by natural gas heat water fast. When compared to an electric water heater, a tankless gas water heater is far more effective and efficient. If your electricity goes out, your water heater will continue to run normally without interruption. During storms or other power outages, this may be quite beneficial. Gas water heaters are more costly to install than electric water heaters. However, because they are less expensive to operate, the money you save on your power bill will more than equal the original cost over time.

In addition, there are safety risks associated with having a gas system. A gas leak may necessitate the hiring of a professional to solve the issue swiftly, and you may be exposed to carbon monoxide and combustible gas as a result of the leak. It is possible to alleviate some of the safety issues associated with using a gas water heating system by installing carbon monoxide detectors in your house. The installation, inspection, and maintenance of your equipment should be handled by a qualified specialist.

Check your connections on a regular basis so that you are aware of when you need to make repairs.

The fact is that they are more cost-effective in the long term. You will save more money over the course of the system’s lifespan than you would have saved up front if you had purchased an electrical unit.

Tankless Water Heaters Vs. Storage Water Heaters

The decision on whether or not to go with a tankless unit is dependent on the amount of demand you intend to place on the unit as well as the environment in which you reside. Water heaters with no tanks take up a fraction of the area required by tanks with tanks, but they are unable to store any hot water. However, after the water is heated, they can produce around four gallons of hot water every minute, which is a significant increase over the previous model. Despite the fact that this may appear to be a lot, it may not be enough if you’re also running the shower, dishwasher, and washing machine at the same time.

  1. Another disadvantage of living in a colder region is that cold water takes longer to heat, so if you’re starting with water that comes in from chilly pipes, it will increase the amount of time it takes to warm the water.
  2. Tank systems are significantly more common, and the majority of homes are already equipped to accommodate them.
  3. An unvented tanked system works by continuously heating the water in your storage tank, allowing you to have hot water on demand anytime you turn on the water faucet.
  4. The majority of individuals choose for a tank with a size between 40 and 55 gallons.
  5. Additional Related Articles:
  • What is the best way to drain a water heater? Is it a tankless job? Determine whether or not a tankless water heater is appropriate for your home. What is the procedure for turning on my water heater? Don’t Forget to Flush Your Toilet! The following is a 6-Step Guide for Flushing Your Gas or Electric Water Heater: Instructions on how to relight the pilot light on your water heater

How Do I Install a Gas Water Heater?

When dealing with gas lines, the most important thing to remember is that safety comes first. Make certain that your gas and water are totally turned off while you are working in order to avoid mishaps and serious injury. Before using the new system, check to see whether there are any leaks. If you are not familiar with all of the safety standards for installing a water heater, we do not advocate attempting to do it yourself. An installation guide for the most popular form of water heater, a gas unit with a storage tank, is provided in this step-by-step instruction.

Step 1: Measure and Prepare the Space

The most effective method for accomplishing this is to measure the unit you presently own and then purchase a new water heater that matches those measurements. Make certain that the new water heater complies with any applicable local laws or ordinances so that you don’t install it only to discover that you have to remove it because it doesn’t meet the requirements.

Step 2: Cut Off the Water Supply

Close the water main shutoff valve, which will shut off the water supply to your whole home.

In addition, turn the water control valve on the unit itself to the off position. Then, turn on all of your faucets around your house to drain as much hot water as you possibly can from your system. Keep the faucets open while the old unit is being removed.

Step 3: Drain the Tank

Drain the tank by attaching a hose to the drain valve and turning it on. You can direct the water to a location outside your house, or you can dump it into buckets or a drain in your home that feeds to the sewage treatment plant. Even though this procedure may take a few minutes or longer, it’s critical to ensure that the tank is completely empty before proceeding.

Step 4: Disconnect the Gas and the Water

A tubing cutter will be required for this stage, if the lines have been soldered together before. Because your water should already be turned off, begin by turning off the gas to the water heater. If you don’t notice any shutdown valves near the heater, you’ll have to turn off the main water supply to the house instead. If you sand the pipe before disconnecting it, it may be easier to solder the new pipe when you reconnect it. Remove the gas pipes, but leave the tank tee and sediment trap in their original locations for safety reasons.

Step 5: Remove the Overflow Pipe and Pressure Release Valve

These will be linked to your newly purchased unit as well. It will be necessary to disconnect your old water heater from the gas exhaust, but you will be able to keep the vent hood in place. Because it will be so hefty, removing your water heater may prove to be a difficult task. Make certain that you understand how and where to dispose of it before moving anything else around. More information on how to dispose of old water heaters may be obtained by contacting your local trash management organization.

Step 6: Clean the Floor

Make certain that you have adequate room to work comfortably. For adequate ventilation, place the new unit at least 6 inches away from any walls or open spaces. Install the new unit and use a level to ensure that it is sitting flat on the floor.

Step 7: Hook Up the Flue Hat

Install the heat trap fittings and water line connections in the reverse sequence of the removal: first connect the flue hat to the gas exhaust vent, then connect the heat trap fittings and water line connections. In the event that you do not properly install them, your water flow will be disrupted, and hot water will not be delivered to your plumbing system. Make sure you’re feeding the lines in the correct direction by following the directions on the lines.

Step 8: Solder the Gas Line

Install the heat trap fittings and water line connections in the reverse sequence of the removal: first, connect the flue hat to the gas exhaust vent, then connect the heat trap fittings to the water line. In the event that you do not properly install them, your water flow will be disrupted and hot water will not be delivered to your plumbing system. Make sure to follow the directions on the lines to ensure that you’re feeding them in the proper manner.

Step 9: Light the Pilot Light

Finally, re-ignite the pilot light and re-connect the water supply. Make careful to turn off any faucets that were left open prior to this procedure.

Is It Difficult to Replace a Gas Water Heater?

Installing a gas water heater is not normally a do-it-yourself project for most homes; you cannot learn how to install a gas water heater in a day or two. If you are not adequately equipped and have no prior plumbing knowledge, doing this procedure can be highly risky. There are a plethora of possibilities for things to go wrong. In addition, you must ensure that your system complies with all applicable building requirements in your area. We recommend that you use a professional plumber for installation since a plumber will be able to install your unit quickly, will frequently be able to dispose of the old unit, and will be familiar with the standards and regulations that control what sort of system you are permitted to install.

As an added bonus, a professional will do all of the necessary safety tests to ensure that your new water heater is free of leaks, providing you with more piece of mind.

How Long Does It Take to Install a Gas Water Heater?

A competent plumber can generally perform the installation in less than two hours with the proper tools. Given the weight of a tank-style water heater, a plumber may enlist the assistance of a coworker in order to complete the removal successfully. It’s possible that you won’t be able to move the unit on your own. If you have no prior expertise, the procedure might take several hours — or possibly all day — since you will need to spend a significant amount of time making sure you understand where everything is supposed to go.

See also:  How To Know If Hot Water Heater Is Going Out?

Learn How to Install a New Water Heater

Because professional installation may easily add $500 or more to the cost of replacing a traditional tank-style water heater, many homeowners are naturally interested in the option of doing it on their own. Furthermore, while it is considered an advanced project, DIYers with sufficient skill may frequently do the task themselves with a little forethought. It’s crucial to highlight that this is not a project for those who are just getting started. Examining the type of water heater you already have is the first step in learning how to install a new water heater in your home.

  1. Then decide on the size: 30-, 40-, 50-, or larger-gallon containers.
  2. You might consider upgrading to a larger unit if your old one did not provide enough hot water.
  3. However, there must be enough space for the larger heater, the flue size must be correct with proper pitch, and the gas line supplied must be sufficient for the heater’s capacity.
  4. Plumbers bid jobs on the basis of a full day’s worth of labor, however, because the project typically grows more intricate as time goes on.
  5. If you’re not sure in your abilities in these areas, hiring a professional is the best course of action.
  6. When it comes to dealing with gas lines, it’s important to always abide by municipal regulations.

Gas Water Heater Venting

It has been usual practice for many years to use atmospheric venting to vent the combustion exhaust fumes from a gas-fueled water heater. In this arrangement, a metal draft hood mounted on top of the water heater directed exhaust gases and a small quantity of fresh air from the room up a metal flue that ran through the roof or into a shared chimney, depending on the model. In many circumstances, connecting an existing flue and draft hood to a new water heater will be all that is required; nevertheless, there are other elements (such as the pitch and draft of the connections) that can make the operation considerably more involved than it appears.

However, the building code in some localities may demand that a new water heater be vented using a different method every time one is installed.

When living in an air-tight home, this is frequently essential to prevent the gas and airflow via the water heater flue from causing an air pressure differential, which can suck gases from the water heater burner into the dwelling.

This is seldom an issue in older, less air-tight houses, though. The process becomes more difficult if your code dictates that you upgrade from an atmospheric vent to a forced-air direct vent or powered direct vent. The majority of folks should hire a professional for this type of service.


It has been usual practice for many years to use atmospheric venting to vent the combustion exhaust gases from a gas-fired water heater. In this arrangement, a metal draft hood mounted on top of the water heater directed exhaust gases and a small quantity of fresh air from the room up a metal flue that ran through the roof or into a shared chimney, depending on the configuration. Oftentimes, connecting a new water heater to an existing flue and draft hood will be the most difficult part of the installation procedure.

  1. It is better to leave this process to specialists since if it is done poorly, exhaust gases (including carbon monoxide) can linger inside the residence.
  2. As a result, many places now need a system known as direct venting, in which a specific double-chambered vent pipe transports exhaust gases out the side of the home while at the same time allowing fresh air into the house.
  3. The installation of a power fan to aid the flow of exhaust gas into the direct vent may also be required by code, depending on how far the direct vent must be extended.
  4. The work becomes more difficult if your code dictates that you upgrade from an atmospheric vent to a directly vented or powered directly vented unit.


  • Purchase of a new water heater, as well as any necessary shimming, plumbing fittings, and plumber’s pipe-seal tape. a draft cowl for the water heater (if one is required for a gas heater)
  • Temperature and pressure relief valves (if not already given)
  • A drain valve for the water heater (if not already provided)
  • Fittings for vent pipes (where required)
  • Nipples for galvanized water heaters with a plastic liner (2)
  • Flexible water heater tubing (if required)
  • Flexible gas heater tubes (if required)

Shut off the Water, and the Gas or Electricity

  • Purchase of a new water heater, as well as any necessary shimming, plumbing fittings, and plumber’s pipe-sealing tape. If a gas water heater is being used, a draft hood will be needed. temperature and pressure relief valve (in the absence of a built-in one)
  • A drain valve for the water heater (in the absence of one built-in). Fittings for vent pipes (where required). nipples for galvanized water heaters with a plastic liner (2) if necessary, flexible water heater tubing
  • If necessary, flexible gas heater tubes

Drain the Water Heater Tank

  • A garden hose should be connected to the drain valve located towards the bottom of the water heater. Open the nearest hot water faucet, such as the one in the bathroom, to avoid suction from building up in the line, which can cause the draining to become sluggish. Place the other end of the hose over a floor drain or direct it to an open area outside. To prevent silt from clogging the drain valve, open it carefully when first turning it on. Allow the tank to empty entirely before turning off the valve and removing the hose from the tank. It is positioned at the bottom of the water heater, near the drain valve. Getty Images courtesy of Dorling Kindersley

Disconnect the Water Lines

  • Disconnect the hot and cold water lines from the water heater by using a pipe wrench or channel-lock pliers to tighten the connections. Flexible tubes (usually coupled with compression or union fittings) or soldered connections (soldered connections must be cut with a tubing cutter) can be used to connect the water lines to the heater.

Disconnect the Electrical or Gas Lines

  • Next, the water heater’s power source must be unplugged from the mains power supply. For an electric water heater, follow these steps: Removing the cover from the wire connection panel at the top of the water heater will reveal the wire connections. Check the individual wires with a non-contact voltage tester to ensure that the circuit is off, and then remove the wire connectors that link the circuit wires to the water heater leads. Remove the cable from the connection box by unscrewing the cable clip and pulling the cable out. For a gas water heater, follow these steps: Remove the gas line from the water heater and make sure the main gas line valve is turned off before reconnecting it to the gas control valve. Depending on the kind of water heater, this gas tube may be a flexible tube covered with vinyl or bare soft copper tubing, or it may be an older water heater with a hard black-pipe connection.

Disconnect the Water Heater Vent (Gas Heaters Only)

  • The vent pipe should be disconnected from the draft hood located on the top of the heater. In most cases, three or four sheet metal screws are used to attach the draft hood to the exhaust vent pipe. In certain cases, if the draft hood is in excellent condition, it may be possible to repurpose it with the new water heater.

Swap the Old Water Heater for the New

Use an appliance dolly with straps to move the old water heater out of the way and wheel in the new water heater. The use of a helper is recommended while moving water heaters up and down basement steps. When transferring the heater, make sure you tie it to the dolly with strong straps. Clean up the area on the floor where the old heater used to be. Bring in the new water heater and align it with the existing plumbing connections so that it is connected to the water heater’s plumbing system. Shimming beneath the legs of the new water heater can help to level it if necessary.


  • Use an appliance dolly with straps to move the old water heater out of the way and wheel in the new water heater in place. If the water heaters must be hauled up and down basement steps, it is ideal to have a second person to assist you with this operation. When transferring the heater, make sure it is properly secured to the dolly. Remove the old heater off the floor and sweep it up. Bring in the new water heater and align it with the existing plumbing connections so that it can be used as a hot water heater. Shimming beneath the legs of the new water heater will help to level it.

Install the Relief Valve and Other Fittings

  • Install all of the necessary fittings that are required for the water heater to function properly. This always comprises a temperature and pressure relief valve (also known as a TPR valve) as well as a drainpipe for discharge. Follow the manufacturer’s instructions to install any additional fittings that may be required. Relief valve for high temperature and high pressure

Connect the Water Lines

  • Install all of the fittings that are necessary for the water heater installation. A temperature and pressure relief valve (TPR valve) as well as a discharge drainpipe are always included. Follow the manufacturer’s instructions for any additional fittings that may be required. Relief valve for high temperature and high pressure.

Connect the Gas or Electrical Lines

  • Connect the gas or electricity sources, depending on their location: For a gas water heater, follow these steps: Connect the gas line to the control valve for the gas burner. Use a flexible gas line if it is available and permitted by local regulations. Check for leaks by turning on the gas supply valve and scrubbing the gas union and any gas joints with a soapy water solution until they are clean. If you notice any bubbles, this indicates that the connection is leaking and that it needs to be tightened. If you are still unable to achieve a satisfactory seal without bubbles, contact your gas provider or a plumber for assistance. For an electric water heater, follow these steps: Connect the electrical cable to the water heater’s wire connection box, which is located at the top of the water heater. Wire connectors should be used to connect the circuit wires to the water heater lead connections. The cover plate for the wire connection box should be attached.

Reconnect the Vent (Gas Heaters Only)

The draft hood should be installed at the top of the water heater, centered above the exhaust aperture, and then inserted into the exhaust pipe. Sheet-metal screws are used to hold it in place. You may need to reduce the vent pipe if the new water heater is higher than the old one. You may accomplish this by cutting the vent pipe down to size using metal shears or by installing a shorter pipe segment. Another option is to lengthen the vent by installing an additional vent pipe segment if your water heater is less than the standard length.

Make certain that the vent is installed in accordance with the manufacturer’s instructions and local code requirements. The new water heater should come with its own set of parts and operating instructions.


  • Shared venting with a chimney or flue that simultaneously serves a furnace (as seen above) is no longer permitted in some municipalities. This means that you may need to hire a professional to reroute the venting for your new water heater in this situation. Getty Images
  • Comstock / Getty Images

Complete the Installation

  1. Connect the hot water faucet to a distant position in the home, then turn on the cold water supply valve to the water heater, allowing the water heater tank to fill with water until the hot water tap is turned off. When water begins to flow from the hot water faucet, you’ll know the tank is completely full. Turning the circuit breaker back on for an electric water heater will re-energize the circuit that supplies electricity to the water heater. If you’re using a gas heater, make sure the main gas valve is open and that the pilot igniter is functioning correctly by following the manufacturer’s instructions. Make your chosen temperature selection on the water heater’s thermostat (120 degrees Fahrenheit is suggested), then wait for the water in the tank to get up to temperature before using it. Turn on the heater and adjust the temperature of the water heater. Banks Photographs courtesy of Getty Images
See also:  What Does It Mean When Hot Water Heater Leaks?

Gas Water Heater Installation: A Step-by-Step DIY Guide

Gas water heater installation may appear to be a job best left to the professionals, but it is not quite as complex as you may assume. Certainly, hiring a professional to complete the work for you is the most convenient option to complete the task at hand. Installing your gas water heater, on the other hand, is a terrific do-it-yourself job if you want to save a little money while still gaining a sense of success. In most cases, it’s advisable to go with the same fuel type (gas or electric) when purchasing a new water heater unless there’s a compelling reason to do otherwise.

They can provide you with information about the local plumbing codes as well as whether or not you will require a municipal permit.

If you hire a professional, you won’t have to worry about this since they will remove your old water heater from your property for you.

Preparing to Install a Gas Water Heater

The chances are considerable that your water heater has reached the end of its useful life and will need to be replaced if it is more than 10 years old. Prior to purchasing a new water heater, however, it is worthwhile to attempt to resolve the issue first using the methods described above. If your water heater is leaking, it is possible that the problem can be resolved. If, on the other hand, the source of the leak is the tank itself, you will need to have the device repaired or replaced.

Tools and Supplies Needed

  • Examine the label on the back of your old water heater. It should include information on the annual energy consumption as well as the tank capacity. Having both of these details handy while searching for a new water heater is a great idea. Before removing your old water heater, we recommend that you examine your water heater vent system to ensure that it is in excellent operating order and that it is functioning correctly. Remove your old heater by disconnecting it and draining it, then removing it with a hand truck. If there is an excessive quantity of sediment buildup in your water heater tank, the drain valve may get clogged. This article will guide you through the process of draining the tank. Take caution when handling the vent pipe. In good condition, you may use it with your new water heater to save money on your energy bills. This is also possible if the Temperature/Pressure Discharge Pipe is in good condition
  • However, this is not always the case. If your water heater was plumbed with copper pipes, you may need to use a tubing cutter to cut the copper pipes in order to repair them. Keep as much pipe as possible intact if this is the case.

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How to Install a Gas Water Heater

Follow these step-by-step instructions to learn how to install a gas water heater, and then watch the video to learn more.

Install Earthquake Straps

The first step is to use a tape measure to determine the placement of the two earthquake straps.

  • In the case of an earthquake, these seismic straps will aid to support the tank against the wall, so preventing it from tumbling over. Measure the water heater from the ground up and mark the wall with the relevant measurements: The upper earthquake strap should be positioned a few inches below the T P Valve on the T P Valve assembly. The lower strap should be positioned a few inches above the gas regulator, and vice versa.

By measuring from the ground up and noting the height with a pencil, you can determine where the picture should be hung on the wall. The seismic strap bracket should be mounted to the wall. Make certain that the screw “catches” a stud. When not in use, the seismic strap should be placed next to the tank. In order to properly tighten the screws, it may be required to “swing” the bracket 180 degrees. Install the new water heater in its proper location. Placing the water heater in a drain pan and connecting the existing piping to the inlet and outlet connections of the water heater are the next steps.

It is not necessary to secure the water heater with earthquake straps.

Connect the Water Supply

Step 2: Using a wire brush, clean the threads of the cold and hot water lines. Installing a ball valve on the coldwater supply line is strongly recommended if the system does not already have one. Connect the water supply lines for hot and cold water. Use caution while installing copper flexible water lines (as seen in the video), since they are prone to kinking if not handled properly. Using the procedure demonstrated in the video, loop the flex connection around many times. Leave enough slack in both the hot and cold water supply lines to allow for expansion and contraction of the vent area.

It is possible to extend the life of a water heater by using dielectric nipples to minimize corrosion between two dissimilar metals.

Sometimes they come pre-installed, but if not, we strongly advise that you get a complete set.

Installers must coat the threads with Teflon tape or pipe joint compound to avoid leakage during installation. (See illustration) 24-hour plumbing service is available for emergencies. Repair – Install – Replace is a three-step process.


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Install the Vent Hood

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Install the Vent Piping

4. If your vent pipe is not damaged, you should be able to reuse it with your new water heater. Consult your water heater’s owner’s handbook to determine the proper vent pipe diameter. If the suggested vent pipe diameter is greater than the diameter of the vent hood, a reducer should not be utilized. In order to begin assembling the adjustable vent pipe, insert one end into the water heater vent hood and join the remaining pipe components. Check the manufacturer’s instructions for your water heater to ensure that the diameter is proper.

This will allow the vent pipe to be aligned as closely as possible to a straight line.

To attach the vent parts to the water heater vent hood and to the other vent sections, use self-tapping sheet metal screws to fasten them together.

Check your local code to see if there are any restrictions.

Install the Gas Connection

Step 5Confirm sure the gas supply is turned off by turning it on and off again. Cleaning the pipe fitting on the supply pipe with a wire brush is then necessary. By opening and shutting the valve, you may flush the line. Remove the sticker from the water heater’s gas control valve and replace it with a plug. This is the location where the gas line will be connected. Remove the gas nipple from the flexible gas line by unscrewing it. Many places, particularly earthquake-prone ones, necessitate the installation of flexible gas lines.

  • Find a Local Plumber in your area.
  • The thread of the gas nipple is threaded with a paintpipe joint compound.
  • Use of gas plumbers tape, which is yellow and less dirty, is another choice; nevertheless, you should never use white Teflon tape since it is toxic.
  • It should be moderately restrictive.
  • We recommend that you tighten the nipple with two wrenches to avoid any damage.
  • Connect the gas flexible line to the gas supply line and the gas control valve on the water heater.
  • If required, make a loop out of the surplus line.
  • Turning on the gas should be avoided at all costs.
  • When you turn on the hot water faucet, you will be notified when the tank is full.
  • When water is running from the hot water faucet, this indicates that the tank is full.

Allow the water to run for a few minutes before turning it off. This will get rid of all of the air that is currently in the tank. As long as the tank is not completely filled and all of the air has been drained out of the tank and lines, the water will splutter.

Connect the Earthquake Straps

Seventh step: Wrap a pair of earthquake straps around the water heater and attach them together. Avoid pulling the straps too tightly; they should be snug but not too so. Then, using clips, secure the extra strap in place. Find Local Plumbing Professionals

Connect the T P Drain Pipe

Step 8If the T P drain pipe from your previous water heater is in good condition, you may be able to reuse it. However, it is possible that you will need to construct a new T P drain pipe. To do this, use a tube cutter to measure and cut a copper pipe. Put a bucket underneath the T P drainage pipe if you do not have a floor drain installed. The end of the drain pipe should not be more than 6 inches above the ground or the bucket it is connected to. Turn on the gas supply valve. To ignite the pilot, go to the owner’s handbook for your water heater.

  1. Place the lower dial on the gas regulator to ” Pilot Lighting ” and then turn the control knob on the gas regulator to ” PILOT ” mode to complete the process.
  2. Once you have waited a few seconds, click the ignitor button while simultaneously pressing the control knob to start the engine.
  3. Another type of sight glass will allow you to visually inspect whether or not the flame has caught.
  4. If the flames were to ignite:
  • Step 8If the T P drain pipe from your previous water heater is in good condition, you can reuse it. A new T P drain pipe, on the other hand, may be necessary. Cut a copper pipe using a tube cutter after measuring and marking it. Put a bucket beneath the T P drainage pipe if you do not have a floor drain installed. No more than six inches above the ground or bucket should be the highest point on the drain pipe. The gas supply should now be turned ON. To ignite the pilot, refer to the instructions in your water heater’s owner’s handbook. Between manufacturers, the technique might differ. Set the lower dial on the gas regulator to ” Pilot Lighting ” and then adjust the control knob on the gas regulator to ” PILOT ” mode to complete the process. Hold down the control knob for a few seconds until it becomes responsive. Then, while simultaneously pushing the control knob and the ignitor button, wait a few seconds. Depending on the model, some waterheaters contain an indication light that illuminates when the pilot light is turned off. Another type of sight glass will allow you to visually examine if the flame has been snuffed out. The following measures should be followed if the flame was extinguished: If the flames ignited, the following would occur:

Lower the dial to the temperature you choose for your drinking water. As a starting point, make use of the manufacturer recommended configuration. The ideal temperature setting is 120 degrees.

Test Gas Lines for Leaks

Step 10: Check for gas leaks by spraying any gas connections with a flammable liquid. You may either make your own solution (1 part dish detergent to 2 parts water) or buy Leak Detection Solution, which is available at most hardware stores. If you observe any “bubbling,” this is a sign that gas is leaking from the system. Applying a wrench to the loose connection and checking it again is recommended.

Watch the Video

After you’ve completed the installation of your gas water heater, there are a few further considerations to make. First and foremost, always check your vents to ensure that they are drawing correctly. If they are not, we urge that you seek the assistance of a specialist to fix the matter. You may learn how to do this by watching the video below.

Watch the Video

After a couple of hours, examine the T P discharge pipe for leaks or damage. The fact that the hose is pouring indicates that the pressure inside your tank is likely to be excessive. Turn off the gas supply and contact an expert as soon as possible. Keeping a carbon monixide detector close by your gas water heater is strongly recommended by us.

They are affordable and will inform you if you are in a potentially hazardous position. Repair and Installation of Water Heaters at the Lowest Possible Price Now is the time to call! Request Estimates from Pre-Approved Local Contractors

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