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Thread: Check Valve problem

  1. Back To Top    #1

    Join Date
    Jun 2009
    Location
    Vero Beach, FL
    Posts
    462

    Check Valve problem

    I woke to find the raised spa water level down and equal to the pool. Its often lowered an inch overnight, but never the foot or so that it did this time. I filled it back up, shut off all valves, and waited overnight to see if there was a leak - but there was not. I opened the flapper type check valve and found a piece of debris stuck around the seal and was confident I had found the problem. But the next day, the spa water level had dropped again. Figured maybe the flapper was damaged, so I bought a replacement. It did not help.

    I have 3 flapper check valves on the system and rotated them hoping one would hold, and none have. I checked the valve body and the soft debris had not damaged or scratched the surface.

    I'm confident there is no leak and it is the valve, but would rather not have to replace the body. Is there anyway to make these valves work a bit better? I've noticed the one keeping water from going back up into the solar panel outlet lets some water through too.
    25' x 13' Roman, 12000 gal IGP, Plaster, with 500 gal Spa
    SWG, 1 HP Max Flo Pump, C-900 cartridge filter
    Solar heat

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Check Valve problem

    Check the lip on the valve body that the flapper seals against and make sure it is clean and free of scratches. If there is damage to that surface you probably have to replace the valve body.

    A secondary issue, debris should not be able to get to that location, as everything should be caught by the filter. An exception to that would be a two pump system where the spa jet water does not go through the filter. If your system does go through the filter, it is probably worth investigating how debris is getting past the filter.
    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
    Jun 2009
    Location
    Vero Beach, FL
    Posts
    462

    Re: Check Valve problem

    Thanks Jason. I should have clarified that I had the filter out and the strain basket for a couple days, and that is why there was debris.
    25' x 13' Roman, 12000 gal IGP, Plaster, with 500 gal Spa
    SWG, 1 HP Max Flo Pump, C-900 cartridge filter
    Solar heat

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