Locked rotor/impeller. Pretty much anything in the pump rather than motor/driver will not affect the amperage that much. There will be some reduction in amperage, but it is not as much as you might think. You may be able to overcome it with careful settings on the amperage draw setpoint for the auto start. A simple test would be to just block in the discharge and dead head the pump momentarily. Theoretically a better solution would be a flow meter, but they tend to be very restrictive and have there own issues.
Two return pumps into a manifold?
- Thread starter metone914
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JMello
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Sorry to dig this back up but figured it was better than starting a new thread.
I wanted to know if it would be ok to run 3-4 pumps to a manifold with a check valve after each pump. It's to run two different display tanks on a 8' sump outside. My reasoning behind it is incase one pump goes down or I want to service one pump but not shut everything down. Out of the manifold I would have valves to adjust pressure for each one, two mains would be returns while the others would be for uv and or chiller then return to the tank. My concern is would the back pressure keep the check valves from opening all the way? After reading the answers here I'm leaning back towards the traditional two pumps pertank with one on a manifold for lessor equipment but would prefer one single manifold.
Please let me know your input esp if someone has done this.
Running multiple pumps into the same manifold is problematic. If the head curves are not closing matched, the stronger pump can totally back out the weaker pump (little of no flow) and cause it to overheat. I would advise against it. Better to dedicate each pump to a particular service.
