Pumps in Parallel
Pumps in Parallel
(OP)
If 2 pumps different sizes are pumping into a common manifold will there be a problem?. Will the larger pump's discharge pressure shut off the non retrun valve on the other pump if it is too big causing the smaller pump to do nothing just spin?





RE: Pumps in Parallel
RE: Pumps in Parallel
Some considerations:
Each pump's motor must handle the pump over its entire curve, for that day when the sister pump breaks down - you still want some flow, even if not full. If the motor is not large enough to handle the end of the curve, it will trip out and you have no flow.
If these are pumps you already have, you may have to trim the impeller on one of them - or buy a bigger impeller (expensive).
RE: Pumps in Parallel