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Universal flo check on return of boiler

Paulied Member Posts: 1
edited February 2023 in THE MAIN WALL
I have a boiler with 2 zones one circulator has flo check the other zone circulator does not if I put a universal flo check on return side will I be ok


  • hot_rod
    hot_rod Member Posts: 22,472
    You need check protection on both pumps. Occasionally some systems need a check on the return to prevent reverse or thermosiphoning up the return
    Most of the newer circulators allow you to slip a check into the pump discharge.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream