Expansion tank

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Expansion tank
Author: yonson (SC) I have a mid 70s two-story home. Copper pipes. A 50 gallon electric water heater. On the cold side of this water heater is a 2 gallon bladder expansion tank. I have no boiler and no hydronic in the house. What should I pressurize the expansion tank to?
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Re: Expansion tank
Author: steve (CA) The tank pressure should match the static incoming water pressure.
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Re: Expansion tank

Author: davidimcintosh (Canada)

Do you have a well and a pump then? I believe "An empty well pressure tank's pressure should be at 2 psi below the cut-on point of the tank. The pressure switch will activate the well pump when pressure drops below the cut-on point."
[www.freshwatersystems.com]

If you are on a municipal system (no well or pump), I am not sure why you would even have a pressure tank? Poor municipal pressure? Odd.

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Re: Expansion tank
Author: bernabeu (SC) some muni systems are CLOSED with checks at the meter the expansion tank is for thermal expansion by the water heater which can not 'relieve' into the main ============================================== "Measure Twice & Cut Once" - Retired U.A. Local 1 & 638
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Re: Expansion tank
Author: davidimcintosh (Canada) Ahhhh, ok, interesting, that makes perfect sense.
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