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How to Replace a Water Heater Expansion Tank?

12/15/2016

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Water increases the pressure inside a water heater tank if it does not get enough room to expand when heated.  If this pressure gets too high, it can damage valves and joints of the plumbing system and even the water heater itself. Water heater expansion tanks are installed on the water supply pipe to deal with water thermal expansion and prevent the water from reaching extreme temperatures. Replacing an inefficient water heater expansion tank can be done easily only if you have thorough knowledge and experience, and the correct tools. Below is a step-by-step method of replacing water heater expansion tank.
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  • Measure the dimensions and power of the water heater expansion tank and purchase a new one same as your existing one.
  • To start with the process first turn off the water supply by closing the shut-off valve.
  • Switch off the main power supply to the entire water heater setup.
  • Make sure that the water heater is cool and drain out the accumulated water from the tank. It is not necessary to completely drain the water heater, but just enough to eliminate the water pressure.
  • Using appropriate wrenches and pliers disconnect and remove the water heater expansion tank carefully. See to it that no pipes or other parts of the system are damaged while doing this.
  • Now, wrap a Teflon tape around the ends of the connectors tightly, leaving first 2-3 threads bare.
  • Carefully screw and install the new water heater expansion tank in the same position as the old one. Make sure all the new connections are tight and secured.
  • Attach a bicycle tire pump to the Schrader valve at the bottom of the tank. Check the pressure with a pressure gauge and fill the tank with recommended amount of air pressure (generally between 12-15 psi). Regulate the pressure level with the help of a pressure gauge.
  • Turn on all the water supply and power valves and switches.
  • Check for any leaks and tighten the connections if needed.
  • Open a faucet and let the water run through the pipes again.

You can carry out this replacement process on your own. But, a lack of experience can be dangerous for you and your water heater system. Hence, Hot Water Tanks Edmonton professionals always advise that you seek help from professional water heater installers. We have a group of skilled professionals who can deal with any water heater related issues and give you essential tips to maintain them.
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The mere thought of your shower spewing out cold water on a chilly morning is horrible. But, this can happen to anyone, even you, if you won’t give much attention to your water tank and don’t get it serviced regularly. We repair, service and install Hot Water Tanks in Edmonton, Sherwood Park, St. Albert, Spruce Grove, Stony Plain and Leduc. 6906 Whyte Ave NW Edmonton, Alberta T6B 0E7 Call us today: 587 400 0890
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