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Thread: Using the pump to drain water

  1. Back To Top    #1

    Join Date
    Aug 2014
    Location
    Palm Bay, FL
    Posts
    17

    Using the pump to drain water

    The picture you see shows my filter housing, which contains a cartridge filter.

    filter_housing.jpgdrain.jpg

    Last fall, a "pool school" guy came out to give some basic information.

    If I recall correctly, one of the things he said was not to use the drain plug shown in the picture to drain water from the pool (the one that appears to me to have been put there for just that purpose). I'm not sure of his reason: I vaguely think it was because it wasn't supposed to be good for something (too much stress or pressure on the housing or pump perhaps? I don't know).

    We get a lot of rain, and any other method I can think of for draining the pool after it overfills after a good downpour would be a lot more hassle than unscrewing that drain plug and turning on the pump.

    1) Was the guy right or wrong?

    2) If I do unscrew this plug to drain the pool, should I leave the return valve from the filter housing to the pool open or closed while draining?

    Thanks!
    5k gal, IG vinyl, Sta-Rite P2R (or P2RA?) series pump, 100 sq ft cartage filter, install date 1996

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Using the pump to drain water

    1) Both, kind of. Draining water through the drain plug is fine. The problem is that if you remove and replace the drain plug too many times it can break, at which point you end up having to replace the entire filter. That isn't likely to happen, but fairly expensive if it does. If you did this once, I wouldn't worry about it at all. But if you do it every week I would expect you to eventually have a problem. What some people do is attach a pipe with a valve to the drain plug socket, so you can just open the valve when you want to drain.

    2) Leave the return valve open. It will drain a little slower, but will avoid some possible problems.
    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

  3. Back To Top    #3

    Join Date
    Jul 2014
    Location
    Winter Springs, Florida
    Posts
    112

    Re: Using the pump to drain water

    I have a similar setup and I plumbed a valve there similar to what bobodaclown did here:

    http://www.troublefreepool.com/threa...lumbing-SOLVED
    ~16000 gallon in-ground gunite. Pentair 160316 cartridge filter. Testing with TF100. Baracuda G3 cleaner.

  4. Back To Top    #4

    Join Date
    Aug 2014
    Location
    Palm Bay, FL
    Posts
    17

    Re: Using the pump to drain water

    Thanks for the great info!
    5k gal, IG vinyl, Sta-Rite P2R (or P2RA?) series pump, 100 sq ft cartage filter, install date 1996

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