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Thread: Spa losing water - possible diagnosis?

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    Prav's Avatar
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    Nov 2010
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    Miami, FL
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    94

    Spa losing water - possible diagnosis?

    Greetings all!

    The setup: pool new to me from 4-5 months ago, about 14x30 generally rectangular with elevated spa/spillover waterfall.

    The problem: with the pump off, water level in the spa was dropping. The longer the pump was off, the lower it dropped, but it generally stopped right below the returns.

    The suspicion: faulty check valve.

    The result: I shut off the spa return, presumably that valve (which is after the check valve) would stop the water. So, with the pump off, it did get back to the previous level.

    The twist: I ran the pump on the pool side only (spa return shut off), and the next morning, the spa was DRY. The pump was not fully primed. So, the problem is on the suction side. Only suction out of the spa is its drain.

    The confirmation: running the pump, I stepped into the now dry spa, and could hear gurgling.

    The diagnosis: faulty Jandy valve, the only way to control the spa main drain: directs suction from pool or spa, and Jandy valve on the pressure side directs returns to pool/waterfall or solely to spa.

    The fix: repair/replace Jandy valve.

    Is the above the right logic? Thoughts/feedback would be appreciated.

    I know I am a bit late for airing this grievance. Happy (insert holiday you observe) to you!
    14'x30' (est. 14K gal) w/spillover spa (est. 500 gal) - 1995 // Diamond Brite Blue Quartz - 2006
    Hayward SwimPure Plus T-15 - 2013 // Zodiac MX-8 - 2013
    Plain ol' Intermatic mechanical timer // Pump: 1 HP Pentair SuperFlo - 2012
    Filter: Hayward C17502(S) Cartridge Filter - 2011 // Heat Pump: Sunrunner/Aquapro 1300 (127K BTU) - 2011

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    In the Industry

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    Re: Spa losing water - possible diagnosis?

    it sounds like you're on the right track. If it were a return leak or check valve, the water loss tends would tend to stop when it reaches the same level as the pool water. Since the water dropped below this, and running the pump sucked it dry, you probably do have a damaged diverter inside the suction side valve. You can get a positive seal neverlube diverter kit for about 45-50 bucks locally or online, and they are easy to install DIY. Before you purchase, remove the 8 screws that hold the valve cover on, remove the diverter & inspect the square seal on the diverter face. Chances are you'll see damage to the seal & the new kit will cure the problem.

    Merry Christmas to you as well!
    APSP CST Certified
    17k inground concrete; 1.5hp 2 speed Tristar pump, 300sq.ft. Cartridge filter, AquaLogic PS-4 w/ Tcell-15, Navigator suction cleaner.

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    Prav's Avatar
    Join Date
    Nov 2010
    Location
    Miami, FL
    Posts
    94

    Re: Spa losing water - solved!

    Just a quick note to say thanks - reply was right on the money. $50 later and problem solved!


    Happy new year!
    14'x30' (est. 14K gal) w/spillover spa (est. 500 gal) - 1995 // Diamond Brite Blue Quartz - 2006
    Hayward SwimPure Plus T-15 - 2013 // Zodiac MX-8 - 2013
    Plain ol' Intermatic mechanical timer // Pump: 1 HP Pentair SuperFlo - 2012
    Filter: Hayward C17502(S) Cartridge Filter - 2011 // Heat Pump: Sunrunner/Aquapro 1300 (127K BTU) - 2011

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