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Expansion Tanks/Pumping Away
Hi, I was reading Dan's post on "pumping away" (https://heatinghelp.com/systems-help-center/pumping-away-piping/)
and it left me with a couple questions:
(1) What's a maximum rule of thumb for just how far away a diaphragm expansion tank can be installed from the air separator? He gives "near or very near to" the air separator but I'm not much of an expert whether that's a foot away or whether the tank (for instance) could be 5 feet above the air separator in the joist space more out of the way.
(2) I currently have an old (and large) steel expansion tank. I'm wondered if (in your opinions) it's worth replacing an old steel tank with a newer model. If we didn't, is there a general rule of thumb for how far away these steel tanks ought to be form the air separator as well? What is the best way you would suggest I roughly calculate the size of tank I need? (I'm finding kind of mixed stuff with google results).