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Thread: Spa Draining when Equipment Shut Off

  1. Back To Top    #1

    Join Date
    Jun 2013
    Plano, TX

    Spa Draining when Equipment Shut Off

    Woke up this morning to find that the spa, which spills over into the pool, had lost about 1/3 of its water overnight.

    Equipment was in service mode with all equipment shut off at 11:00 pm. The equipment had been in service mode and main pump running 24/7 since last week when I started shock process. The pool passed all three of the shock tests yesterday morning, so I decided to shut the pump off for the night.

    Before I left for work, I kept the equipment in service mode and turned on the pump. The spa began to fill via normal flow. My wife says that the spa is now full and spilling over.

    Any ideas on what might be happening with the spa?

    33,000 gal, IG/plaster, spa/waterfall combo plus waterfall
    Hayward DE filter 72 ft, 2.0 HP Hayward Tristar pump
    1.5 HP Hayward Northstar pump for waterfall, SWG,
    Polaris 280 cleaner
    Nine 1/2 foot deep end with diving board

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

    Re: Spa Draining when Equipment Shut Off

    There is a check valve on the pipe that sends water to the spa, and a three way valve that determines if water returning from the spa goes to the pump or not. If either of those valves is leaking (dirty or broken) they can allow the spa to drain down when the pump is off. Problems with the check valve are a little more common.
    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

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