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Re Installed a rebuilt pump and now the pump starts surging once I open up the flow to the max. Previously it did not.

Reason why removed for overhaul ws the capacitor did not work , so didn't start and on ispection had a loose impeller nut and 1st stage impeller had rubbed on the diffuser.

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I think an air leak into the suction side, or with the new-found power of a tight impeller, the water level in the skimmer box is a bit low.

Check all joints, especially the rubber bellows which is usually on the suction side of the pump basket, and the seal on top of that basket.

Posted on Mar 06, 2015

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Thank you for posting your question here on Fixya.com.

Have you cleaned or replaced the in-line filter found at the wall socket? How about the pressure valve found just after the wall socket...is it fully open, possibly allowing too much water to bypass the cleaner and return to the pool?

How about the main filter? If overall system flow is reduced because of a dirty main filter the booster pump would be 'boosting' lower than normal pressure so the net result at the cleaner is reduced as well. A cartridge filter is especially problematic here. It can look clean after rinsing it but after enough use the element needs to be replaced to restore original system flow.

Are there multiple return paths for water back to the pool that have valves? Can you throttle down a return to, say a spa for example, to force more water to the dedicated line for the cleaner?

If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!

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