T&T: re Hot Water Tank plumbing

[Alec McLocklin (amclockl)]

Actually, the best option is to have a pressure tank on both, the usual
one on the cold if your pump is an older model that can support one, and
one after the check valve for the hot side of the system.  Your correct
that there will be high pressure build up on the other side of the check
valve, but without one, your cold water system will always have hot
water intrusion, causing your hot water system to run longer than
necessary.

Alec


I wouldn't want a check valve in the inlet to my water heater.  As the
cold water heats it will expand and may cause excessively high pressure
on the hot water system.  The high pressure can damage your tank and
pluming.  I would have an expansion tank on the cold water plumbing.  An
expansion tank will reduce pump cycling and allow for expansion.

--
Shay Glass