While you guys are on expansion tanks, do you all set the tank air pressure equal to or slightly more than the water PSI? or do you leave it at the factory precharge? Curious what others do.
1 or 2psi lower is miniscule compared to the 20-30psi swing that the air pressure will see when the system is active. 1 or 2psi has almost no effect on the total room for expansion.Seems like if the air pressure is lower than the water PSI The expansion tank has little to no room for expansion. Wouldn’t the higher water pressure fill the ballon to capacity? Would Newton’s law not apply here? I was always taught slightly above. 5psi range. I’ve seen others never touch the Schrader and not have problems. Maybe I’m not grasping the tank construction fully. Mainly in regards to thermal expansion.