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Thread: Pentiar Challenger CFII-N1-1 1/2A Not Pumping

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    Join Date
    May 2014
    Location
    Niskayuna, NY
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    2

    Pentiar Challenger CFII-N1-1 1/2A Not Pumping

    OK...First time Pool DIY'er and I failed to open the return line. Doh! Discovered all kinds of water flowing out of pump. I quickly opened the valve realizing my error ,but water continued to leak slightly from bottom of pump where it meets the motor (damage is done). After 24 hours for super-chlorinating and while I was vacuuming the pool, the Pentair Challenger 1.5 hp pump lost suction. It is about 8 yrs old. I cleaned the Pentair FNS PLus 48 Filter. I cant get water to flow. the pump sounds like its on...but I can't get it primed.

    What is the first thing to check? Im thinking of attempting to repair my self...not sure what to look for. Do I replace all seals? And how do I detach the pump? do I need to cut piping?

    Any help is appreciated.
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    JasonLion's Avatar
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    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: Pentiar Challenger CFII-N1-1 1/2A Not Pumping

    Failing to prime usually means a suction side air leak of some kind, probably at the same place that water is leaking out when it is off.

    You will need to cut pipe to get the pump out. The plumbing has fittings close to the pump, so it is going to be a little tricky getting the new pump plumbed in.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Join Date
    May 2014
    Location
    Niskayuna, NY
    Posts
    2

    Re: Pentiar Challenger CFII-N1-1 1/2A Not Pumping

    I figured it out! I was able to repair using this forum and a little hlpe form the following you tube video showing how to replace Pentair challenger seals. link: http://www.youtube.com/watch?v=n-Yz9k6bmLk . I only managed to damage the seal plate in the process, so unfortunately my repair cost ended up being ~$119 versus $50.

    Thanks all.

    14400 gal,, Vinyl, Pentair Challenger 1.5 HP, Pentair FLS 48 DE Filter, Kreepy

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