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Thread: Drain Problem

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    Drain Problem

    Hey, y'all!

    I'm helping to run a community pool, run by volunteers from the neighborhood. For several reasons we chose to drain the pool; terrible algae problem, need to make some some repairs and so on. I drained the pool through the main drain with the pool pump, it worked great, but it was getting dark and so, with about 3 feet of water just above the drain in the diving section we shut it down for the night, thinking it would continue to drain during the night.

    Needless to say, it did not keep draining. We rented a sump pump and pumped it out, did our cleaning and painting and began to fill the pool.

    I went to check on the pool today, and decided to test the pump and drain. I can get no flow through the main drain, so I assume there are two possibilities as to the cause: the drain is clogged up with goop, or there is a vapor lock (air) in the drain pipe. The drain line has to come up from the drain into the pump house, so I kind of favor the air theory.

    So the question is, how to fix this? I don't want to run the pump for an extended period of time without water...

    Thanks in advance for your help!
    80,000 gal community pool
    Painted concrete
    Dual Triton 125 gpm sand filters

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD
    If the pool isn't full the pump might not be able to prime. The height above water level that a pump can prime from varies from pump to pump but is rarely the full depth of the pool.

    If the pipe is blocked and you can open up the pipe at the pump end, you could try using a drain king, see here, on the pump end of the pipe and see if you can push the clog back out the drain.
    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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