Question about Pentair 3hp Whisperflo Pool Pump In - Ground

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I have a 1hp whisperflo (we24). It became noisy but was still pumping normally so I sent it to get fixed and they changed the bearings. When it came back the flow was down by about half...so much that my salt system is telling me "no flow". They took it back and changed some screws that were broken but it just came back with the same very low flow. It looks as if the impellor is not seated properly. Any suggestion?

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Their is a wear ring that goes on the front of the impeller. Be sure that is there and on right. Most people will put this on with the large side against the impeller but it goes on with the large side out. This is so when the pump starts it will slide forward and give you all the pressure you can get. Also make sure you have the "O" ring on the front of the diffuser. It will help to seal and divert the water in the direction it's suppose to go.
Without these on correct the water can go from the pressure side of the impeller around the diffuser and back to the front of the impeller again. Loosing up to 30% of your pressure.

Posted on Sep 06, 2010

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