Pump sizing

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unsrek1

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Jul 14, 2010
22
Reno, Nevada
I currently have a 25,000-gallon IG pool with a WhisperFlo WFE3 .75 HP pump installed in an underground vault about 4 feet below water level - although I just noticed that when the impeller was replaced on the pump 7 years ago, the repairman used a .5 HP impeller. So I'm probably only getting the .5 HP flow rate. First question: Do I have the right-sized pump for my pool? The pool has a single main drain, 2 skimmers, and 4 returns. Couldn't find a pump sizing tool online.
Second question: I'm thinking of adding a roof-mounted solar heating system for the pool. Will this require a new, larger pump?
Thanks.
 
That is a very reasonable pump for that pool. I have a WFE-2 on a slightly smaller pool and only need to run it five or six hours a day.

That pump will be fine for most solar systems, though it won't be enough for an especially high roof.
 
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