thermal expansion tank

  1. meeotch

    Thermal expansion and water hammer arrestor - three questions

    I just had my 40 gal water heater replaced. On its first heating cycle, the pressure release line squirted out 1-2 cups of water. I opened the manual, and on page 6 was a giant warning about thermal expansion tanks being required in the presence of a backflow preventer (which my building does...
  2. Dallin Lewis

    Expansion Tank Installation--horizontal with flex pipes

    I installed an A.O. Smith water heater with a friend (handier than me) a few weeks back. There's intermittent leaking at the T/P valve, and I'm confident that I need to install an expansion tank (the old heater had one, but it is not reusable). My question is whether I can work with the flex...
  3. Avgust

    Thermal Expansion Tank question

    Hi all, I recently moved into a new house (built in 2016). I found a thermal expansion tank in an attic space above the garage. The valve to the tank is closed (see pic below). Shouldn't it be open? Not sure if it matters, but the house has tankless gas heater. Thanks in advance! Alex
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