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Thread: Solar backflow into pool

  1. Back To Top    #1

    Join Date
    May 2012
    Pleasanton, California

    Solar backflow into pool

    I have a second story rooftop solar. If I shut off the pump, I get a backflow through the pump/filter/to the skimmer.

    I relieve this issue somewhat by closing the solar for about fifteen minutes before shutting off the pump. Apparently this allows the pipes to bleed slowly, but I still hear clicking at my solar check valve as the water forces its way back down.

    Will this cause a failure in the solar valve eventually? Should I put in a more robust one-way valve where the water starts its climb up to the roof?

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Solar backflow into pool

    Welcome to TFP!

    You should put a one way valve after the filter and before the split off to the solar panels.

    Clicking at the check valve isn't a problem. It is just the flap flapping, which it is designed to take in stride.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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