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Thread: Raised Spa draining into pool when pump is off

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    Raised Spa draining into pool when pump is off

    Hi Everyone,

    I am having issue with my spa water draining into my pool when the pump is off. After further research, it seems like my only solution is to install a check valve. However, with the way my plumbing is currently constructed, I will need a check valve that can be installed vertically with "downward" flow. But I have not found any check valve that can do that. Most valves I found stating that they have to be installed horizontally or vertically with upward pressure. Has any one of you ever encounter any situation like this? Would you please let me know if you found a valve that worked with downward pressure? Thanks

    Below is a picture of the return pipes for both my spa (left) and pool (right):
    Attached Images Attached Images

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    Patrick_B's Avatar
    Join Date
    Jun 2011
    Midland TX

    Re: Raised Spa draining into pool when pump is off

    TFP Moderator
    Essential Links:
    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

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    TxBwana's Avatar
    Join Date
    Mar 2017
    Plano, TX

    Re: Raised Spa draining into pool when pump is off

    Before you do that, you might want to check to make sure the o-rings are all good in your valves... seems to me when we had that problem once, it was an o-ring that had gone bad.
    15k IG gunite, built 1999, RiverBend Sandler, attached spa, Dolphin S200, Pentair Triton II sand filter, Wet Edge Prism Matrix in Constellation with extra ocean shells handcast, Pentair MasterTemp 400, my remodel

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    In the Industry

    bdavis466's Avatar
    Join Date
    Aug 2014
    San Clemente, CA

    Re: Raised Spa draining into pool when pump is off

    The Pentair and Jandy style check valves are often incorrectly mounted in that orientation but work just fine. That looks to be about your only option without getting too crazy with replumbing.

    Pool/Spa, Pentair Equipment

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