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Too high temp on boiler

JerryD Member Posts: 1
Had to replace a pump (Bell and Gossett) on a 60 year old radiant heat system. Pump and motor look identical but seem to flow in the opposite direction according to the arrow on the housing( which seems strange to me.) . Hooked it all up with opposite flow, the only way it fits. Pump and boiler seem fine but no water circulation and the temp went up to 220 F (before I shut it down) while it always ran at 140 before. I assume there is a check valve blocking it, but cannot find it. Flipped the housing but I have to chop out a wall to move a water heater which is in the way with it flipped. Any advice please?


  • rick in Alaska
    rick in Alaska Member Posts: 1,457
    If the motor on the pump is what is getting in the way of your water heater, you can take the motor loose on the pump and rotate it 180 degrees. Then put the pump back in with the arrow going in the right direction!