lmei007 Member Messages 183 Reaction score 0 Points 16 Location Maryland Feb 8, 2012 #1 which way is better for adding a new zone in a hot water heating system, a separate flow check valve + a regular circulator or a circulator with a built in flow check valve?
which way is better for adding a new zone in a hot water heating system, a separate flow check valve + a regular circulator or a circulator with a built in flow check valve?
