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Potable water expansion tankreplacement

Installing a water heater expansion tank requires knowledge of local plumbing codes, working with very hot and high-pressure systems, and potentially cutting your home's water pipes. It's highly recommended that you call a professional for this job to ensure your home's water supply stays working correctly and protects against water damage.

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A water heater expansion tank—or thermal expansion tank—is a small tank added to a water supply pipe. It acts as a safety device and minimizes the risk of pressure damage, bursts, and leaks in a home's plumbing system.

Traditional tank-style water heaters and boilers for home heating systems could face problems from this pressure over time unless measures are taken to prevent damage. A water heater expansion tank is a way to preserve the life of plumbing systems.

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A closed plumbing system keeps water flowing one way, from your area's main supply, into your home instead of letting any flow back in the event of a pressure buildup. They are put in place to keep public water supplies clean and can be identified through check valves connecting the pipes and backflow prevention devices near your water meter or where pipes enter your home.

It is essential to ensure that your new water expansion tank is large enough to relieve the pressure from your main heater. Most homes need between two and five gallons, but the exact size will depend on the size of your water heater tank, the water pressure, and the starting and ending water temperatures.

Potable water expansion tankleaking

Most modern-day water heaters are tankless, heating water on demand instead of keeping it stored, come with built-in thermal protection, or are installed within an open plumbing system. They don't usually need an expansion tank, but older models with traditional tanks and closed plumbing do.

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These could all indicate stress on your plumbing system or pressure needing to be regulated and released from your pipes more frequently than it should.

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Aaron Stickley is a licensed plumber with 15 years of experience in commercial, new residential plumbing, and residential service and repair. He started his own residential service and repair plumbing business. Aaron's articles about plumbing on The Spruce span four years.

A water heater is the fixture responsible for heating and storing the hot water flowing from every sink and shower in your home. A standard tank heater can stress your plumbing pipes when thermal expansion causes the hot water to take up more room in the tank.

The price of a 2-4.4 water heater expansion tank on its own ranges from $40 to $200, and the cost of labor can fall anywhere between $50 and $150, depending on your area and the location and accessibility of your water heater tank.

Water heaters last about eight to 12 years. A thermal expansion tank reduces wear on the heater and can prevent a tank blowout, potentially extending its life.

If you have an older water heater, there are a few telltale signs you may need to install an expansion tank. Look for drips and leaks from your faucets, fluctuating water pressure, loud noises, and mineral deposits around your water pipes' fittings.

It activates when expanded hot water overflows from the main tank and pushes against an air cushion within the expansion tank, compressing the cushion and allowing water to flow in.

Once you have all the numbers you need, input the information into an expansion tank size calculator offered by brands Amtrol or Watts.

Potable water expansion tankinstallation

Series LF70A, LFL70A Hot Water Extender Tempering Valves are used in residential water supply applications to mix cold and hot water to extend capacity of water heater storage tanks and hot water boiler tankless heaters. It features Lead Free* brass body construction, dial adjustment cap, replaceable thermostat, stainless steel spring and is available with either threaded or solder end connections . Series LF70A temperature range: 120°F to 160°F. Series LFL70A temperature range: 100°F to 130°F. Maximum Pressure: 150psi (10 bar).

However, if you are confident in your plumbing skills and have a near-expert knowledge and experience, you can install a water heater expansion tank.

Wattspotable Water Expansion tank

A water heater expansion tank typically lasts five to ten years. If you notice dripping water, mineral deposits on your pipes, decreased water pressure, or a change in water quality, it's best to check the health of your tank and consider a replacement.

This alleviates the pressure of thermal expansion by giving the excess hot water a place to go. It also helps maintain consistent water temperature and pressure flowing through your home's taps.