Question about Pentair 1hp Whisperflo Pool Pump In - Ground

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Good morning. Three years ago we had an inground 15,000 gallon salt water pool installed that included a Pentair pump. The last couple of mornings there is a terrrible whine occurring as the pump kicks on. Perhaps it's cavitating, perhaps the bearings have worn out I don't know. The information plate on the pump says it's a three-quarters horse power motor. It also says 1.27 SF and .95 SFHP and part number 7-186236-20. The plate doesn't say anything about Challenger, Intelliflow, SuperFlo, SuperMax, Waterfall, WhisperFlo. It might be time to replace the pump. It looks mostly like the SuperFlo or WhisperFlo, but not exactly. How can I figure out what the replacement pump is?

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More than likly it's a square flange motor. If the noise is just starting when you take the pump apart you can check the impeller for problems but the most likley is a bearing going bad from a seal leak. If you remove the wires and take the motor with the back half of the pump to a pool store they can diagnose it for you and do the nessary repairs at the shop. Usually they will do this for a small bench fee or for just the price of the nessary parts.

Posted on Oct 07, 2010

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