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circ pumps circulators

b & g series 60 in-line pumps
differential across pumps is 10-15
one pump is 40-45 what is causing higher differential


  • ScottSecor
    ScottSecor Member Posts: 855
    Higher pressure differential equals more restriction/ head.  

    In other words the pump with the bigger difference on pressure is working harder to move the water.  Most often this is due to a longer run, more restrictions,  etc
  • bburd
    bburd Member Posts: 912
    Or partially closed valves.

  • hot_rod
    hot_rod Member Posts: 22,121
    Plugged strainers
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream