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Thread: Problems with Hydrostatic Valve

  1. Back To Top    #1

    Join Date
    May 2010
    Location
    Durham, CT
    Posts
    34

    Problems with Hydrostatic Valve

    Hello everyone. I had a new gunite pool installed last year; first pool I ever owned. They installed a hydrostatic valve because of the very high water table we have in the area. After I had it filled with water I noticed that the pool was leaking water. Turned out that the hydrostatic valve could not close due to debris being stuck in there. Once fixed I had no problems the rest of the summer.

    To winterize the pool company pumped out 18" of water. When we opened it this year the pool was down a total of about 24" and I lost another 7" just over the last weekend. I am pretty sure that the valve must have opened at some point and got stuck again. Maybe pumping out 18" was too much and the valve opened up in March during the very wet weather here in the Northeast due to the pressure on the pool.

    So what do I do that this won't happen every year. I basically have to have a diver come by, clean out the valve and then have the entire pool refilled. I probably need about 15000 gallons (pool holds about 24000 gallons) Total cost about $750.

    Can I plug the hydrostatic valve, or is that not advisable. The pool builder wouldn't "recommend" it, but also said it's an option and should not be a problem while the pool is filled. It would only be a problem if the pool needs to be drained, in which case the valve must be opened again. I understand that the valve is there to prevent the pool from popping out of the ground, but is that really a problem when the pool is filled? On the other hand the valve somewhere did open and got stuck again.

    Any advise?

    Thanks.
    24000 gallon Gunnite Pool
    WhisperFlo 1.5 hp Pump
    AquaConfort SWG System
    Solar Heating System

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    21,774

    Re: Problems with Hydrostatic Valve

    As long as the pool stays full, plugging the valve shouldn't be a problem.

    It's an exposure problem. Is the chance that something happens to empty the pool (leak, line blows out with pump running, etc.) while the valve is plugged small enough to risk it? Only you can answer that. You also have to take into consideration what the normal level of the water table is most of the year. If the pool did get emptied, what's the chance that the water table will be high enough to pop the pool out of the ground.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  3. Back To Top    #3

    Join Date
    May 2010
    Location
    Durham, CT
    Posts
    34

    Re: Problems with Hydrostatic Valve

    Thanks for the reply. At this point I am not going to plug the hydrostatic valve; why take the chance. I talked to the pool company yesterday and they said I can replace the plastic valve with a commercial heavy duty bronze valve. Maybe that will fix the problem.
    24000 gallon Gunnite Pool
    WhisperFlo 1.5 hp Pump
    AquaConfort SWG System
    Solar Heating System

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