adjusting thermal expansion tank
#1
02-23-16, 03:41 PM
adjusting thermal expansion tank
I adjust the air pressure in my thermal expansion tank. I drained the plumbing system and then adjusted the psi.
My question is....
I believe its necessary to make adjustments when the system is under 0 pressure.
But do you have to remove the expansion tank from the system completely, completely drain it, adjust the pressure, and then put it back up?
My question is....
I believe its necessary to make adjustments when the system is under 0 pressure.
But do you have to remove the expansion tank from the system completely, completely drain it, adjust the pressure, and then put it back up?
#4
02-24-16, 01:52 AM
Join Date: Mar 2006
Location: Wet side of Washington state.
Posts: 16,321
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With a properly sized expansion tank the amount of water within it when the system pressure is zero will be irrelevant. Be sure to pressurize it to the average water pressure of the system or maybe a couple of psi over. An expansion tank pressurized to less than the system pressure is useless.
