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Thread: Spa Draining into pool - Is something wrong with my plumbing

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    Spa Draining into pool - Is something wrong with my plumbing


    First of let me start by saying thank you for any information or tips you can give me, we are new pool owners and so far I have been figuring everything out thanks to these forums accept for one lingering issue. The spa drains into the pool no matter what I do so far we have replaced the diverters and the sole check valve and it still drains. One thing we noticed is there is a small 3/4 pipe outlet in the spa that seems to release water into 3 similar pipes within the pool odd I know. I am attaching pictures of my equipment set up I have heard that I may be missing a diverter or additional check valve?

    25,000 gal, 20'x40' rectangular, vinyl liner, 1.4HP main pump, booster pump, cartridge filter, Nature2 installed, but not using, 1 skimmer, 2 jets

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Spa Draining into pool - Is something wrong with my plum

    Having the spa drain back into the pool can happen when the spa check valve isn't sealing properly, when the valve on the spa suction line to the shared pool/spa pump is not closing completely, or when there is a leak in the spa plumbing or the spa it's self.

    The check valve is on the downward leg of one of one of the two pipe that split off of the heater output and go into the ground. From the picture it looks like it is the style that can be serviced fairly easily. The three way valve that controls pool vs spa suction is the three way valve closest to the pump intake. If either of those is leaking internally the spa would drain down.
    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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