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Thread: Pool accidentally draining! how do I shut off the main drain??

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    futility's Avatar
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    Pool accidentally draining! how do I shut off the main drain??

    suddenly it's draining!

    Got clear enough to see bottom and enjoy.

    Main drain cover was broken, bunch of bricks/rocks in there. I pried one out with a pole and a few hours later I've lost 6" of water. could the rocks have been holding a plug in? I don;t know how to stop it. Pool is from 19878. drain looks like a skimmer basket, can;t make out what is down there. are they designed to be operated from above with a pole? so I have to swim down to turn it off? can I put a rubber welcome mat over it to stop the flow until I figure it out? would be a shame to lose all the water I just spent a month cleaning!!!
    22000 gal / IG / plaster / Hayward S244T - 3.1 sq' - 62 GPM / 1 speed pump / 1978 / gas heat (inactive)

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    Mod Squad JohnT's Avatar
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    Re: Pool accidentally draining! how do I shut off the main drain??

    The drain is normally connected to the pool plumbing. Usually the plumbing connects from the side and there is a hydrostatic relief valve in the bottom for gunite pools.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: Pool accidentally draining! how do I shut off the main drain??

    Most likely the hydrostatic relief valve is stuck open.

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    futility's Avatar
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    Re: Pool accidentally draining! how do I shut off the main drain??

    Quote Originally Posted by JamesW View Post
    Most likely the hydrostatic relief valve is stuck open.
    Thanks! I think that's what it was. A couple of trips down with goggles revealed a large threaded plug. A couple of more 'dives' and I had it screwed back in and haven;t lost any more water. Adding enough to reach the skimmers so I can run the pump again!
    22000 gal / IG / plaster / Hayward S244T - 3.1 sq' - 62 GPM / 1 speed pump / 1978 / gas heat (inactive)

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    Re: Pool accidentally draining! how do I shut off the main drain??

    This happened to me before, cleaned the filter and didnt put top on perfectly right(it can be a pain). Went outside 30 minutes later and i see half my pool water gone

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