How To Install On Demand Water Heater

How to Install a Tankless Water Heater

Instructions from a professional on how to remove an old water heater tank, prepare the area for installation of a tankless water heater, and finally install the tankless water heater Because it does not store a huge amount of heated water, a tankless water heater, also known as an on-demand water heater, saves money over a traditional water heater. Essentially, it serves to give hot water on demand, so you won’t have to worry about the shower suddenly being chilly. The process of installing a gas tankless water heater consists of mounting the unit, connecting the gas and water lines, and installing a flue.

Therefore, it may not function well in a family where two or three showers may be operating at the same time, as an example.

It is both small and very efficient to use a tankless water heater.

The following skills are required if you opt to conduct the task yourself: shutting off the water to your house (seeHow to Shut Off the Water to Fixtures) and cutting into and connecting new fittings and pipes to your supply pipes (if you have copper pipes, seeCuttingJoining Copper Pipe).

There is also the need for a gas line and an electrical connection to a 120-volt circuit.

It is not necessary to vent an indoor electric tankless water heater to the outdoors because it is contained within the home.

It may either be hooked into a 240-volt outlet or directly attached to a power source such as a generator.

Tankless Water Heater Preparation

Remember to complete all essential preparations before disconnecting and removing your present water heater; you don’t want to be without hot water for a week or two while you wait for any plumbing, electrical, or vent work to be completed. If you are installing a new gas unit, you should determine whether you need to upgrade your gas meter. Because the unit consumes a considerable amount of BTUs, it is possible that your meter does not have the capacity to feed it in addition to the other gas-using appliances in your home.

  • Request that the gas provider inspect your new unit to ensure that it is receiving the appropriate amount of manifold pressure for it.
  • It is better to employ a professional plumber to install a new gas line if you need to replace an existing one.
  • This will save you time and money.
  • The fact that a tankless water heater generates a significant amount of condensation and pushes air out with a fan necessitates the installation of category II stainless-steel exhaust pipe with firmly sealed silicon joints, as seen in the second video below.
  • A damper is an excellent addition for those who live in colder climates since it prevents chilly air from re-entering the home.
  • Floor drains and utility sinks should be used to dispose of the excess liquid.
  • In addition to gas, a gas unit requires 120-volt electrical power.
  • You can watch this wonderful video from This Old House, which will provide you with an excellent explanation of the many stages involved in installing a tankless water heater.
  • He makes the decision to remove and replace his malfunctioning water heater with a tankless water heater, and he guides us through the entire procedure with his hands on assistance.
  • Codes demand that a subpanel (which may or may not be included with the unit) be erected next to the unit in order to comply.

Connect the wire to the subpanel and then from the subpanel to the unit, starting at the unit. It is essential that the electricity to the water heater’s circuit is turned off at all times while the work is being performed. +Find a Water Heater Installation Specialist in Your Area

Removing the Old Water Heater

In the majority of circumstances, a new tankless water heater will be installed in lieu of an existing storage water heater. In Ron Hazelton’s video above, he refers to our website for the directions, which are as follows: How to Flush or Drain a Water Heater (with Pictures). In order to remove the old water heater, turn off the valves on the two water lines (one for the input and one for the output) that lead into the existing water heater and disconnect them. To remove and detach the water heater’s lines from the water heater, use channel-type pliers or a pipe wrench.

  1. Drain the tank by opening the drain valve located at the bottom.
  2. Don Vandervort writes for HomeTips.
  3. A segment or two of vent pipe should be disconnected and removed.
  4. If you decide to handle it yourself, cut off the circuit at the service panel and check to be that the power has been turned off completely.
  5. If you require assistance with this project, contact a local water heater professional.

Installing a Tankless Water Heater

Tankless units can be fitted flush against the wall (against the drywall or plaster), or they can be inserted into the wall between the studs. Using a stud finder, identify the studs in the wall where you want to install the unit, and then cut a hole between each of them. Attach the item to the wall in accordance with the manufacturer’s recommendations. Water supply pipes should be routed to the water heater. Make certain that the pipe from the water utility is linked to the inlet and that the pipe flowing to the home is connected to the outlet before starting the project.

  • You might also want to consider installing a pressure-relief valve.
  • The water valves should be opened, but not those for the power or gas.
  • Close the water valves and turn off the water.
  • Replace the filter, turn on the water valves, turn on the electrical power, and turn on the gas valves if necessary.

Finally, test the equipment to ensure that it is in proper functioning condition. Resource Highlighted: Find a Pre-Screened Water Heater Pro in Your AreaCall today for free estimates from pre-screened water heater professionals in your area: 1-866-342-3263

Read This Before You Buy a Tankless Water Heater

Consider the following: The method used by the majority of houses in this nation to heat water is ridiculously inefficient. Every year, we fill up large storage tanks of 40- to 50-gallon capacity with water and then continuously pump energy into them to ensure that we have hot water available anytime we want it. But, unfortunately, this is not always the case. The wait for the tank to reheat might be lengthy if a teenager is taking a long shower or the spouse is enjoying a long soak in the tub.

Is there a chance of a leak?

Tankless Water Heater Installation: Is It Worth It?

Investing in a tankless water heater has a number of benefits, as detailed above. It creates hot water just when you use it and for as long as you require it, resulting in a reduction of 27 to 50% in fuel expenses when compared to tank-type heaters. (A typical gas-fired tank wastes 40 to 50% of the fuel it burns, according to the manufacturer.) As a result, there is virtually little danger of a catastrophic leak occurring because there is no tank to collapse. Furthermore, since their introduction in the United States in the 1990s, tankless heaters have become increasingly sophisticated, with features such as built-in recirculating pumps (which provide “instant” hot water) and wireless connectivity, which alerts you via smartphone when a unit requires servicing.

Our tankless water heater guide will explain how they function, what you should know before purchasing one (and before the installation comes), and the idiosyncrasies of how they operate so that you won’t be caught off guard if you decide to go tankless.

How Does a Tankless Water Heater Work?

Doug Adams created the illustration.

  1. It all starts with the first turn of the hot-water faucet (1). A flow sensor (2) detects the presence of water entering the heater and sends a signal to the control panel, causing the heater to begin generating hot water. During operation of a natural-gas-fueled unit, thecontrol panel (3) activates thefan (4), which pulls in outside air, opens the gas valve (5), which allows the gas to flow into the unit, and ignites the burner (6). In order to transmit heat from the flames to water passing through the exchanger’s tubing, a heat exchanger (number 7) is used. The mixing valve (8) regulates the temperature of the superheated water that exits the exchanger. Whenever the temperature sensor (9) detects water temperatures that are too high or too low for the intended setting, the panel will modify the gas valve, the mixing valve, and the flow-regulating water valve (10) in accordance with the results. Ventilation is provided by a sealedvent (11) (or a couple of vents) via a roof or exterior wall, which removes exhaust gases and supplies combustion air to the burner.

Several people were thanked for their contributions: Phillip Maxwell, Residential Product Manager, Rheem; Eric Manzano, Product Training Supervisor, Noritz; Joe Holliday, Senior Vice President, Product and Business Development, Rinnai; and Fred Molina, Water Heater Products Manager, Bosch Thermotechnology

What to Know About Tankless Water Heaters

Thanks to Noritz for the use of his photo.

How Much Does a Tankless Water Heater Cost?

Prices range from approximately $170 for modest gas-fired units to more than $2,000 for high-output heaters that can serve two showers at the same time; $1,000 is a reasonable starting point for most buyers. Electric heaters without a tank range in price from $90 to $900. The expenses of a first-time installation are higher than the price of a simple tank replacement. Electric tankless water heater installation (see item below headed “Installing an Electric Tankless Water Heater”).

How to Install a Tankless Water Heater

This is a work that should be left to the professionals, since it entails creating leak-free water, vent, and gas connections in the case of gas or propane units, or upgrading the wiring and circuit-breaker panel in the case of electric units, and it is best left to the professionals.

Tankless Water Heater Maintenance

Sign up to have a professional do an annual service that includes cleaning or replacing water and air filters, as well as inspecting the burner’s operation.

The use of a vinegar flush every 500 hours in places with hard water prevents mineral accumulation, known as scale, from blocking the heat exchanger. That 20-minute task may be completed by a professional or by a homeowner.

How Long Do Tankless Water Heaters Last?

It is expected that gas-burning tankless water heaters would last 20 years or longer, which is two to three times longer than tank-type heaters. Tankless electric units have shorter life lifetimes, ranging from 7 to 10 years, compared to conventional units.

Where Can I Buy One?

They may be found at plumbing supply stores, big-box stores, and internet sellers, among other places. Alternatively, you may order one via your plumber.

Pros and Cons of Tankless Water Heaters

These heaters are available in plumbing supply stores, big-box stores, and online vendors. Alternatively, your plumber can arrange for one.

PRO: They’re Compact

As a result of new federal requirements requiring stronger insulation to decrease standby heat loss, the size of newer tank-type water heaters has increased. Consequently, they may not be able to fit into locations where an older heater with the same capacity might. Tankless gas heaters are approximately the size of a suitcase and are mounted on the wall.

PRO: They’re Safer

A tank-type heater, on the other hand, may leak and spill gallons of water if it springs a leak, but it will not house Legionella germs or topple over in an earthquake. The air supply and exhaust vents are also closed to prevent backdrafting, which would otherwise allow carbon monoxide to enter the house.

PRO: They’re Easy to Winterize

Owners of vacation homes are well aware of how long it takes to drain a water-heating tank prior to closing up a house for the season. An electric compressor may drain a tankless heater in a matter of seconds, after which it can simply be unplugged.

CON: They’re Sensitive to Slow Flow

These devices automatically shut off if there is too much scale accumulation in the pipes, or if the aerators in the faucets and showerheads get blocked, or if a turned-down faucet limits water flow to around 0.3 gpm.

CON: The Payback Takes Awhile

An annual savings of only around $100 for a household using a $1,000 tankless gas heater vs a $400 tank-type heater is possible, depending on how efficient the heater is and how much hot water is utilized. The savings, however, begin to accrue after six years, when many tanks are reaching the end of their useful lives due to the extended lifespan of tankless gas systems.

New Tankless Water Heater Technology

An annual savings of just around $100 for a household using a $1,000 tankless gas heater vs a $400 tank-type heater is possible, depending on how efficient the heater is and how much hot water it produces. The savings, however, begin to accrue after six years, when many tanks are reaching the end of their useful lives due to the extended life of tankless gas systems.

Higher Efficiency

Condensing gas heaters can extract up to 96 percent of the heat from a fuel, which is a 17 percent improvement over first-generation tankless devices. This is possible because of a second heat exchanger, which collects a large portion of the exhaust heat before it exits the vent. In addition to being around 25% more expensive than noncondensing heaters, condensing heaters produce acidic condensate that must be neutralized. If a heater doesn’t come with a built-in neutralizing cartridge, the installation will have to install one after the fact.

See also:  How Long For Hot Water Heater To Heat Water

Instant Hot Water

A second heat exchanger, which collects much of the exhaust heat before it leaves the unit, allows condensing gas heaters to extract up to 96 percent of the heat from a fuel, a 17 percent improvement over first-generation tankless devices.

They’re roughly 25% more expensive than noncondensing heaters, and they produce an acidic condensate that must be neutralized before it can be reused again. Installation of a neutralizing cartridge is required when a heater does not come with one built in.

Wi-Fi Compatible

Tankless systems with digital connectivity let you to control the temperature as well as monitor gas and hot-water use from your mobile device. Furthermore, the device is capable of identifying the cause of a problem. Please communicate this information to your plumber so that he or she may arrive on the job site knowing exactly what has to be done. This function also eliminates the need for any guessing when it comes to determining when it is time to descale.

Tankless Water Heater Rebates: A Great Way to Save

Carl Tremblay captured this image.

What Size Tankless Water Heater Do I Need?

Here’s how the specialists ensure that your water heater produces adequate hot water: 1. A large burst of BTUs is required for a tankless heater to convert cold water into hot water in a matter of seconds. However, if a heater’s Btu output is insufficient to meet demand, it will reduce the flow rate or, in the worst scenario, offer tepid water. A plumber considers three aspects when determining whether or not a heater will be able to satisfy the demands of a household:

  • The temperature of the water that enters the heater
  • The maximum demand for hot water expressed in gallons per minute (gpm)
  • The efficiency of the heater, as shown by its Uniform Energy Factor, which may be found in the product specifications
  1. The temperature of the water entering the heater
  2. And Gallons per minute (gpm) is the peak demand for hot water. This is reflected by the heater’s efficiency, which can be found in the product specifications as itsUniform Energy Factor.

Btus Output Estimate

Not interested in completing the calculations? Make a rough estimate of how much heater output you’ll want using these statistics.

  • The following figures are for one bathroom for one to two people: 140,000 Btus
  • Two bathrooms for two to three people: 190,000 Btus
  • Three bathrooms for three to five people: 380,000 Btus

Btus Per Gallon by Region

  • Kitchen or bath faucets should flow at 1.5–2.2 gpm
  • Tub filler faucets should flow at 4 gpm
  • Dishwasher: 1–2.5 gpm
  • Washing machine: 1.5–3 gpm
  • Showerhead should flow at 1.25–2.5 gpm

How to Determine gpm?

To get the real gpm of a fixture, time how many seconds it takes to fill a bucket to the 1-quart mark and multiply that time by the number of gpm. gpm is calculated by dividing 15 by the number of seconds in a minute.

Electric Tankless Water Heater Facts

If you want to know how many seconds it takes to fill a bucket up to the 1-quart mark, you may time it to discover out how many gpm a fixture has. Calculating gpm is as simple as multiplying 15 by the number of seconds in a minute.

Tankless Water Heater Installation

Doug Adams created the illustration. What you and your plumber should look for before the installation day is as follows:

Gas Line

If you want your tankless heater to work effectively, you must connect it to a gas supply line that supplies enough volume at a high enough pressure to run the burner. In many circumstances, this will need increasing the diameter of the supply pipe to 3-4 inches in diameter. Furthermore, if the pressure is insufficient, the gas provider will be required to change the regulator on the meter. For your information, some tankless systems, like as ones manufactured by Rheem, are capable of working with a regular 12-inch gas line as long as it is not more than 24 feet in length.

Venting

Tankless gas heaters that do not condense employ stainless-steel vents that can resist high exhaust temperatures. Condensing systems feature a cooler exhaust and use PVC pipes, which are less costly than other types of exhaust. Installing a concentric vent, which has an exhaust pipe inside a larger air-intake pipe, is easier than installing a traditional vent since only one hole in the wall needs to be made. As a point of reference, vent runs have traditionally been limited to a maximum of 10 feet.

Water Hardness

Heat transmission is slowed and water flow is restricted when scale deposits accumulate in a heat exchanger (or on electric heating components) over time. If you currently have whole-house water softening, scale will not be an issue for you. However, if your water is not being softened and its hardness surpasses 120 milligrams per liter, it is worthwhile to invest in a treatment system to remove the hardness.

For your information, a specific, point-of-use cartridge, such as the TAC-ler water conditioner (Stiebel Eltron), can be used to change the hardness of water without the use of salt or other chemicals.

Outdoor Tankless Water Heater

Matt Risinger captured this image. If your environment and local rules allow it, think about the advantages of hanging a heater outside in the winter.

  • Saves space: You won’t have to create place for another appliance in your home as a result of this. Installation is straightforward: Because of the built-in exhaust vent, there is no need to drill a large hole (or two) through the side of the building. Service is simple: A plumber may come to your home at any time, whether or not you are there. However, take in mind the following: Regulations governing construction: If you want to install it outside, you may require approval from your local building department. Weather conditions that are cold: Even at temperatures as low as 22 degrees Fahrenheit, internal heaters keep components warm, but exposed water lines must be insulated and covered with heat tape that activates automatically in freezing conditions. Southern states are less concerned about frozen pipes than those located north of the Mason-Dixon Line.

Tankless Water Heater Venting

Carl Tremblay captured this image. Are you in need of assistance with repairs around your home? A house warranty may be of assistance. The This Old House Reviews team has put up some in-depth guidelines that you can read here:

  • Home warranty providers that are the best
  • Reviews of American Home Shield, AFC Home Club, Select Home Warranty, and Choice Home Warranty are all available.

Thinking of upgrading to a tankless water heater? Before doing so, learn the pros and cons of installing one

Are you considering making the switch to a tankless water heater? Before doing so, educate yourself about the advantages and disadvantages of installing one, including the cost, needs, and upkeep. It is possible that you are considering installing a tankless water heater in your house if it is time to replace your current water heater. We’ll explain how tankless water heaters function and point out some of its pros and downsides to assist you in making the best decision about which kind to install.

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How Tankless Water Heaters Work

Known variously as demand type, on-demand, or instantaneous water heaters, these appliances heat water directly, eliminating the need to store water. A flow detecting device is installed in a tankless heater, and it is triggered anytime the hot water tap is opened. A gas burner or an electric element is used to heat the water, which is then sent to the various locations in your home where it is needed. You won’t have to worry about running out of hot water because there isn’t a tank that has to be filled.

Advantages Of Tankless Water Heaters

  • They are more compact than typical storage heaters, are wall-mounted, and do not take up any floor space when not in use. As a result of their size, they can be particularly appealing in houses where space is limited
  • They can also help you save money on your energy bills. According to the United States Department of Energy, heating water accounts for around 30% of a family’s total energy use. It is possible to save up to 50% on these expenditures by installing a tankless water heater, resulting in an average yearly savings of $80. Tankless water heaters are also more durable and less likely to malfunction, resulting in potentially disastrous flooding in your house. Compared to traditional water heaters, tankless systems have a lifespan that is about twice as long – 20 years or more.

Disadvantages Of Tankless Water Heaters

  • Tankless units are more costly than conventional units. It will cost around the same as a standard tank type to purchase an electric tankless heater, however a gas tankless heater would cost between $1,000 to $1,200. The national average for tankless unit installation is somewhat more than $1,700, which is in addition to the original cost of the unit. A safe vent must be created for a gas unit to prevent carbon monoxide from collecting within the property in many circumstances. Existing plumbing must also be expanded or moved in many cases. Tankless water heaters do not provide “instant hot water,” even when energy savings are taken into consideration
  • For many households, it will take around 20 years to completely return their expenditures. It is not always the case that a tankless water heater delivers hot water to your faucet any faster than a traditional water heater, contrary to common belief. In fact, a tankless device may be more time consuming. It takes some time for the tankless unit’s heating element to warm up the water before it can be delivered to the faucet
  • The amount of hot water that can be delivered is limited by the unit’s ability to heat the water. It is typical for tankless water heaters to provide 2-5 gallon-per-minute flows of hot water, which may not be sufficient for several simultaneous uses of hot water in your home. For example, having a shower and running the dishwasher at the same time may cause a tankless water heater to reach its maximum capacity and fail. Comparing tankless versions, especially if you live in a multi-person home, is important. Pay close attention to the gallons per minute (GPM) flow rate of each type. The bigger the number of users and the greater the number of simultaneous usage options, the higher the GPM requirement. In order to satisfy the needs of a big home, one alternative is to install many tankless units
  • However, this can become quite costly over time. It is possible that tankless water heaters will not provide hot water during a power outage. Tankless water heaters, in contrast to traditional water heaters, do not provide a backup hot water supply in emergency scenarios
  • Tankless systems are also subject to failure owing to hard water. Hard water is a concern for all water heaters, but it is particularly challenging for tankless water heaters. They should be completely emptied and their filters updated on a monthly basis. They also require frequent flushing to function properly. (Tank units only need to be flushed once or twice a year, at most.) If you don’t take the necessary precautions, hard water can completely ruin a tankless water heater in as little as two years. In addition, failing to adhere to these maintenance requirements may result in the voiding of the manufacturer’s guarantee
  • Tankless devices are hard to maintain. Investigate the interior workings of a common tankless water heater or air conditioner. As a result of all the complex technologies tankless water heaters rely on, it is easy to understand how much may possibly go wrong.

Gas or Electric

Electric tankless water heaters are significantly less expensive than their gas counterparts. Installation is less complicated and less expensive, and they are often less difficult to maintain than gas-powered ones. Only a few handful, however, have the capability of serving many locations at the same time. Gas units are available in a wide range of types and sizes for both residential and commercial applications, with outputs ranging from 130,000 to 380,000 BTUs in certain cases. More BTUs equate to more heating capacity.

As a result, your home’s gas pipe, meter, and main line to the meter may not be correctly proportioned, necessitating a costly reconfiguration and installation of new equipment.

The total energy efficiency of a tankless water heater is assessed using an energy factor (EF) rating, which is available for both gas and electric types.

See also:  How To Keep Tankless Water Heater From Freezing

Tankless water heater energy factors now range between.64 and.91 for gas-fired devices, and up to.99 for electric versions, depending on the manufacturer.

For a home of one or two persons, a tankless electric unit will most likely be more than sufficient. For bigger families, a gas-fired tankless water heater is most likely the most cost-effective option.

Water Heater Protection

Whatever method you use to fulfill your household’s hot water requirements, you’ll want to make sure that the investment you’ve made in your water heater is protected. That entails completing the preventative water heater maintenance advised by the manufacturer, as well as routinely emptying the tank (or lines) to remove potentially harmful silt and scale. Consider obtaining an American Home Shield® Water Heater Home Warranty to help reduce the expenses involved with the repair and replacement of your water heater even more.

It is particularly stated that AHS takes no responsibility, and expressly disclaims all liability, in connection with your use of any and all material included on this website.

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How to Install or Replace a Tankless Water Heater

Despite the fact that it’s a tankless job, someone has to do it. Leaving aside the dad jokes, installing a tankless water heater is a serious undertaking that should be approached with caution. Our goal is to make this process as simple and pleasant as possible, so we’ve included step-by-step instructions for both gas and electric units below. Take note that replacing a tankless water heater is a time-consuming process requiring advanced technical knowledge. So, if you aren’t confident in your plumbing and electrical abilities, it is preferable to engage a licensed professional – in certain areas, this is a legal requirement.

How to Install a Gas Tankless Water Heater

Installation and replacement of tankless water heaters may be quite expensive, as we realize. Installing your own unit is doable, but we recommend that you proceed with caution. This should only be attempted if you have extensive experience working with gas lines, water lines, and electrical systems. Installing your tankless water heater incorrectly might result in significant harm to your home. Unsafe gas line installation may cause explosions, while faulty gas venting can result in deadly carbon dioxide leaking into your house.

If you are considering a do-it-yourself installation, it is critical that you understand the terms of your insurance policy.

You can install your unit yourself if you are confident in your abilities and have double-checked with your insurance company.

Step 1

Depending on the manufacturer, if their systems are not installed by certified professionals, the warranty may be voided.

Step 2

Make certain that you obtain all necessary state or local permissions before installing or upgrading a water heater.

Step 3

For water pressure more than 80 psi, you’ll need to install a pressure-reducing valve upstream of the new water heater before it will work properly.

When establishing the cold and hot water connections (as described in the section below under “Establish the cold and hot water connections”), you should consider whether or not you need to install one.

Step 4

  • Make sure you check your local construction codes to see where you may put your water heater in your home. These tankless gas systems must be vented directly to the outdoors, rather than through a chimney, in order to function properly. Consequently, it is vital to identify a position where the unit may readily vent outdoors while also complying with local code requirements for vent placement. Carefully review the manufacturer’s installation instructions to ensure that you have adequate clearance around the device
  • Stay away from locations where:
  • Temperatures below freezing might have an impact on the unit. Any form of liquid might be sprayed on the device on a regular basis. There is a significant amount of humidity and wetness

Step 5

Make careful to accurately measure the space where you intend to install the water heater to ensure that you acquire the appropriate-sized unit.

Step 6

  • Tankless gas water heaters consume more gas than traditional tank-style water heaters. Determine whether or not your present gas line will be sufficient initially
  • If not, upgrade it. A professional contractor will be required to install a newer, larger gas pipe if your present gas line is unable to keep up with the demand.

Step 7

  • If there isn’t a shut-off valve before the heater, cut off the main water supply
  • Otherwise, turn off the heater. Remove the heater from service by closing all power and gas supply valves to it. Disconnect the unit’s power
  • When dealing with hot water, utilize a hose that is designed to tolerate high temperatures. To relieve pressure in the system, open a hot water faucet for a few minutes. Allow it to completely drain
  • Ensure that the water heater is disconnected from the gas and water pipes. Make sure to properly dispose of your old water heater.
  • For information on how to properly dispose of it, contact your local recycling and/or sanitation agencies.

Step 8

  • Ensure that the device is properly supported by constructing a mounting box that is approximately four inches away from the wall. The foundation wall should be properly secured with appropriate anchors. Follow the manufacturer’s instructions for mounting the device to the box firmly.

Step 9

  • Hiring a professional contractor should be your first choice unless you have extensive knowledge with gas line installations. Utilize a threaded black iron pipe to connect the existing tee to the unit position if your present gas line is the suitable size and you can connect it without breaking the existing connection. Remember to switch off the main gas line before removing the down pipe from the previous unit if you’re replacing it. After ensuring that the gas line is routed to the right location, you should install a tee, a sediment trap, and a gas shut-off valve. The shutdown valve and sediment trap should be connected to the heater in accordance with the manufacturer’s instructions. Install a new gas supply line from the tee to a location where it can be conveniently connected to the gas line of the new unit. You may utilize a black pipe or a flexible gas supply line to accomplish this task. Assemble the connections in the direction of the heater, starting with the tee, using two wrenches. Whenever possible, use thread sealant developed for gas lines when connecting gas pipe assemblies. After you have completed all of the gas line connections, you should test the line. Before turning on the gas, check the pressure with a pressure gauge.

Step 10

  • Connecting the water heater valves to the water supply line should be done according to the manufacturer’s instructions.
  • Connecting new hot and cold water lines to existing water lines should be done with copper pipe. Continue to connect the wires to the new unit. It is possible that copper pipe will need to be cut and soldered to the unit.
  • Depending on whether your water system includes an anti-siphon valve or a check valve on the supply line, you may require an expansion tank close to the cold intake. More information can be found in your vehicle’s owner handbook. Bell hangers should be used to secure the pipe to the wall. Place the pressure relief valve in its proper location. Installing a purge valve and a pressure relief valve should be done according to the manufacturer’s instructions.

Step 11

  • Make sure there are no leaks by turning on the water supply. To check for leaks, turn on the gas and wait a few minutes. It is possible that you will need to bleed the line. Afterwards, switch off the gas supply until the installation is complete.

Step 12

  • When it comes to correctly venting the device, follow the manufacturer’s recommendations as a reference. There’s a considerable probability that you’ll be able to vent your water heater straight through the rim joists in your home. Only utilize pipes that have been specifically designed for this sort of venting. In some cases, depending on the manufacturer, you may require a vent kit. Make sure that the vent shaft of the new unit is sealed with a heat-resistant silicone sealant. Afterwards, attach a connection to it and secure it with an appropriate hose clamp
  • Place a length of stainless steel vent pipe on top of the structure. Put on a retaining ring to keep it in place. Folding over the tabs can help to keep it secure. Slip an elbow inside a pocket. Make sure that the aperture faces the direction in which the unit will vent to the outside
  • Select a spot on the joist or wall that will serve as the center of the vent hole for the purpose of venting outdoors. Drill a hole from the inside of the building at the location you’ve picked. Make a circle on the outer wall with a vent thimble and tape it in place. A spade bit should be used to bore a 1-inch hole at the center of the circular. Remove siding and shingles from around the vent hole in order to allow the flange thimble to be flat against the outside wall
  • Caulk around the edge of the flange with silicone caulk to seal the edge of the flange to the outside wall. Then, place the flange into the vent hole that has been created. Use screws to securely fasten it to the outer wall and silicone to seal the screws in place. Installing the internal flange should be done from the inside. A portion of vent pipe should be routed through the flange aperture. Tabs should be used to secure each part. Attach a short portion of vent pipe to the outside of the house and then connect the vent hood
  • Put the shingles and siding back on the house that you removed previously.

Step 13

  • To remove air from the water pipes and heater, turn on the faucet to its full “hot” setting. Close the water supply valve

Step 14

Connect the water heater to the wall outlet. That is all there is to it.

Step 15

The hot water line that originates from the water heater should be insulated.

Step 16

The gas should be turned on when the installation is complete. Your water heater should be up and running at this point!

How to Install an Electric Tankless Water Heater

Installation and replacement of tankless water heaters may be quite expensive, as we realize. Installing your own unit is doable, but we recommend that you proceed with caution. This should only be attempted if you have extensive experience working with water lines and electrical systems. Installing your tankless water heater incorrectly might result in significant harm to your home. If you are considering a do-it-yourself installation, it is critical that you understand the terms of your insurance policy.

You can install your unit yourself if you are confident in your abilities and have double-checked with your insurance company.

Step 1

Depending on the manufacturer, if their systems are not installed by certified professionals, the warranty may be voided.

Step 2

Confirm that your electrical service panel has the capacity to manage the energy demands of an electric tankless water heater before installing one. It’s possible that you’ll need to upgrade your panel or install a whole new one. It is possible to uncover useful information by inspecting your electrical breaker box or the label on the electrical panel in your home. You might also consult with an electrician. The majority of suitable water heaters require a minimum of four 40AMP breakers to deliver hot water for a two and a half bath house.

Step 3

For water pressure more than 80 psi, you’ll need to install a pressure-reducing valve upstream of the new water heater before it will work properly. When establishing the cold and hot water connections (as described in the section below under “Establish the cold and hot water connections”), you should consider whether or not you need to install one.

Step 4

Make certain that you obtain all necessary state or local permissions before installing or upgrading a water heater.

Step 5

  • In order to heat water for the entire house, it is best to locate the unit closest to the area in which the majority of the hot water is consumed. If you’re installing a point-of-use system, try to locate them as near to the points of use as feasible. Always keep in mind that most electric tankless water heaters must be mounted vertically, with the water and electrical supply connections on the bottom of the unit. Follow the manufacturer’s recommendations for leaving a particular amount of clearance for service
  • In general, you want to stay away from locations where:
  • Temperatures below freezing might have an impact on the unit. Any form of liquid might be sprayed on the device on a regular basis. There is a significant amount of humidity and wetness

Step 6

Disconnect any circuit breakers that are connected to the new device. This is critically crucial!

Step 7

You don’t want your office to become a swamp!

Step 8

  • If there isn’t a shut-off valve before the heater, cut off the main water supply
  • Otherwise, turn off the heater. Remove the heater from service by closing all power and gas supply valves to it. Disconnect the unit’s power
  • When dealing with hot water, utilize a hose that is designed to tolerate high temperatures. To relieve pressure in the system, open a hot water faucet for a few minutes. Allow it to completely drain
  • Ensure that the water heater is disconnected from the gas and water pipes. Make sure to properly dispose of your old water heater.
  • For information on how to properly dispose of it, contact your local recycling and/or sanitation agencies.
See also:  How To Replace Water Heater Expansion Tank

Step 9

  • Remove any screws that are holding the front cover of the new device in place
  • And Please keep in mind that you may need to remove at least one plug before you can set it aside.

Step 10

Any screws holding the front cover of the new unit together should be removed. Please keep in mind that you may need to remove at least one plug before you can put it away.

Step 11

  • Connections for the cold and hot water should be made. The right side of the body is commonly affected by a cold.
  • The quickest and most straightforward method is to use stainless steel flex pipe with Teflon tape. You can also utilize copper tubing that has been rated for use in high-temperature environments. If you have to cut into a pipe, make sure the edges are clean. Before connecting the pipes to the water heater, flush them with water once they have been soldered. Also keep in mind that too much heat might cause harm to the water heater. If you want to do maintenance on your heater, it’s a good idea to install a shut-off valve before and after it. This will allow you to stop off the water supply to the unit without shutting off the water supply to the rest of your home
  • If you need to install a pressure reduction valve, you should do it immediately on the cold water side of the plumbing system. The installation of a temperature and pressure relief valve is unlikely to be necessary (T P). However, you should double-check your local and state installation rules to see whether or not you require a permit.

Step 12

  • In this case, stainless steel flex pipe with Teflon tape is the quickest and most straightforward solution. It’s also possible to utilize copper tubing that has been rated for high-temperature usage. Make sure to tidy up the edges of the pipe if you have to cut into one. Prior to attaching the water heater to the soldered pipes, clean them out with water. It’s also important to realize that too much heat might be detrimental to your water heater. If you want to do maintenance on your heater, it’s a good idea to install a shut-off valve before and after it. This will allow you to switch off the water supply to the unit without also turning off the water supply to the rest of your home
  • If you need to install a pressure reduction valve, you should do it now on the cold water side of the plumbing system
  • Temperature and pressure relief valves are not likely to be required in your situation (T P). It’s best to double-check your local and state installation codes, though, to make sure you don’t require one.

Step 13

This step must not be skipped!

Step 14

  • Heater on one side, and electrical panel on the other, is the recommended arrangement
  • Comply with the manufacturer’s wiring diagram and their instructions for selecting the appropriate wire, circuit breaker number, and circuit breaker size
  • And Cutting and stripping every wire set to the proper length is followed by pushing them through the bottom holes of the new water heater’s housing. After that, connect the wires to the appropriate slots on the terminal block.
  • For the most appropriate torque, see the product handbook. It is important to remember that a ground conductor must be connected to the circuit breaker panel and the grounding busbar of the unit for each circuit.
  • Double-check that all of the electrical connections are in proper working order and that all of the wire sets have been appropriately installed.

Step 15

Make use of the screws that you already removed.

Step 16

The device should be turned on at this point. Select your chosen unit settings from the drop-down menu.

Step 17

Start by turning on the hot side of a faucet in your home.

After the water temperature has steadied, take another reading. The temperature may be adjusted on the device itself if you desire to do so.

Learn More About Tankless Water Heaters

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How to Install a Tankless Electric Water Heater: A 10-Step Guide

An Overview of the Process of Installing or Replacing an Electric Water Heater

  • Step 1: Turn off the circuit breaker and shut off the water supply. Step 2: Turn off the water heater. Step 3: Take off the front cover. Step 4: Install the water heater. Step 5: Join the pipes together. Install the flow and pressure valves in the next step. Burning the hot water system is step 7. In Step 8, you will inspect the electrical components. Activate the circuit breaker (Step 9)
  • Tenth step: check the temperature and outlets

Some problems with water heaters can be repaired. For those who have an old or outdated water heater, it may be necessary to replace it. Although it is possible for a water heater to survive for up to 20 years, the majority of them only last 10 years. If you plan to install a tankless electric water heater yourself, it’s critical that you understand what you’re getting yourself into before you begin. This Might Also Be of Interest to You: Installing or replacing a gas water heater is a simple process.

If you arrive at a job site without the proper tools or a clear grasp of the tasks at hand, it’s likely that you’ll run into problems that will cost you both time and money.

1. Switch Off Circuit Breaker and Water Supply

Immediately before to beginning the job, it is critical that the circuit breaker be turned off in order to guarantee that the electric wires are not powered on while you are working. At this time, you should also switch off the water supply to your home unless you want to risk flooding your home while attempting to replace your present water heater with a new one. Always keep in mind that flooding may cost tens of thousands of dollars in damage, which is why doing the first item on this list is the most critical.

2. Drain Your Old Heater Before Disconnecting It

The tank-type water heater that is now installed in your home will need to be drained prior to being removed from the structure. This will necessitate the use of a hose and a container, such as a bucket. Check out our how-to guide on how to drain a water heater for more thorough information. The old wiring and wall-mounting brackets will need to be removed first, and then the connecting pipes will need to be unscrewed. Be careful not to do any harm to the old wiring or pipes while performing this procedure.

3. Remove the Front Cover

The front cover of the new tankless unit should be carefully removed with a screwdriver before the unit can be installed. Once all of the screws have been removed, store them in a safe location where they will not be misplaced. It is vital to use all of these screws in order for your water heater to perform correctly. Take into consideration the possibility that wires will be connected between the cover and the device. Carefully unplug the cables before removing the lid completely.

4. Mount the Water Heater

Following that, the device will need to be attached to a wall. Make certain that the water heater is not installed in a cluttered or disorganized location of your house or business. Having said that, it’s critical that you have quick access to the unit in the case of an accident or other emergency.

Mounting the water heater is straightforward and may be accomplished using a combination of screws and the mount that comes with the unit. Follow the installation instructions that came with your item.

5. Connect Any Pipes

Upon completion of the installation, you will need to connect the pipes that will deliver hot water throughout your home. These are the connectors that will be used to bring water into and out of your water heater. They should be positioned at the bottom of the unit, if possible. When you receive your device, it is possible that you may be given an installation diagram, which you should look to in order to establish where the connections should be made. Stainless steel is the ideal sort of pipe material for a tankless water heater since it is corrosion resistant.

Copper and PVC piping are suitable alternatives to stainless steel piping if you do not have access to stainless steel pipes.

Many instruction manuals recommend that you clean your equipment on a regular basis.

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6. Install Flow and Pressure Valves

As soon as all of the connections have been completed, it’s time to install the flow and pressure control valves. Flow valves are straightforward to install. In the event that repairs are required, you may simply cut off the water supply to the heater rather than having to shut off water throughout the rest of your property. Pressure valves are only required if and when the local plumbing authority specifies that they are needed. The pressure release valve should be put on the side of the electric water heater that is closest to the “hot water.” To ensure optimum safety, you might also install one on the other side of the heater from the heater.

7. Bleed the Hot Water System

When you get to this step of the installation procedure, you should have the water heater connected and completely installed. However, you’ll still want to go through the process of bleeding the system before turning on the hot water supply. Every hot water outlet in your home should be opened, as this will aid in the removal of any air that may have accumulated in the system. Ensure that these outlets remain open for a few minutes, following which the bleeding procedure should be finished successfully.

8. Inspect Electrical Connections Before Attaching Cover

It is critical that you take the time to verify the electrical connections to your water heater in order to protect your own safety as well as the safety of everyone else in your family. Check to see that the connections are correctly connected and that the terminals have been placed in the proper locations. After that, the cover should be reattached using all of the screws that were previously used. The installation process is practically complete once the unit’s cover has been properly put on top of the device.

9. Switch Circuit Breaker On

It is critical that you thoroughly verify the electrical connections to your water heater to guarantee your own safety as well as the safety of everyone else in your home. Check to see that the connections are correctly connected and that the terminals have been placed in the proper locations on the computer.

Finally, reattach the lid using all of the screws that were previously used. It is virtually finished with the installation process once the cover has been properly fitted on the device.

10. Check Temperature and Test Outlets

Once the water heater has been switched on, you’ll want to adjust the temperature settings on the system. Because these units may get extremely hot when used at their maximum settings, it is suggested that you avoid using them in order to reduce the possibility of burns. This is also a good time to check every hot water outlet in your home, including taps, showers, dishwashers, and laundry washers, to ensure that the temperature is proper and that the water warms up quickly. Turning down the temperature settings may be necessary if the water is becoming too hot to handle.

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