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Thread: bottom drain

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    bottom drain

    Do you need a bottom drain in your pool?

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    JasonLion's Avatar
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    Re: bottom drain

    Welcome to TFP!

    No, you do not need a bottom drain, though having one is very nice. I recommend a bottom drain for plaster and fiberglass pools, but not for vinyl liner pools. With a vinyl liner, the risk of leaks around the drain becomes more significant than the advantages of having a 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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    Re: bottom drain

    We have a bottom drain in our 30' Vinyl AG pool and I wouldn't have it any other way. It makes cleaning the pool much easier. Have had our pool for 10 years and have had no problem with leaks...keeping fingers crossed. If we had gotten a smaller pool we wouldn't have gotten the drain. But 30' is a lot harder to clean.
    30' Round Vinyl AG, 21,200 K GAL. with Main drain, Hayward 1.5 HP Pump, Sand filter, BBB Method & TF~100 Test Kit

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    kenmar's Avatar
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    Re: bottom drain

    "No, you do not need a bottom drain, though having one is very nice. I recommend a bottom drain for plaster and fiberglass pools, but not for vinyl liner pools. With a vinyl liner, the risk of leaks around the drain becomes more significant than the advantages of having a drain."
    Hmm, this is the first time I recall seeing any mention of not recommending bottom drains for vinyl lined pools here.

    How much greater is the risk of leakage with a vinyl liner pool?

    -Ken-
    20'x40' / 30,000 Gal / In Ground / Vinyl
    Pentair FNS 48 DE Filter / Pentair Challenger 1.5 HP Pump
    Jandy Lite2 400k BTU Propane Heater / Dolphin Dynamic cleaning robot
    TF-100 Test Kit / BBB
    Creator of SimplePool (BBB Friendly Android App) http://www.simplepool.net

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    Re: bottom drain

    My vinyl pool doesnt have a bottom drain. The builder said he doesnt like them in a vinyl pool. Instead, he puts in a side wall suction. Acts the same, but doesnt pull water off the bottom. It still turns the water over just fine.
    14,000 gallon IG, Vinyl. Hayward 3/4 hp superpump, Penatair IC40 SWCG, Pentair automation, Hayward sand filter, Aqua Comfort heat pump, Hayward 400k Lo-Nox LP heater.

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    JasonLion's Avatar
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    Re: bottom drain

    A bottom drain in a vinyl liner pool is likely to be just fine. However if the liner does tear around the drain you can lose all your water very quickly. It is a very rare problem, with a high cost when it does happen. I don't like that kind of risk, even if 99 out of 100 pools are going to be fine.
    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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    In the Industry

    X-PertPool's Avatar
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    Re: bottom drain

    main drains are nice for the pool circulation but I don't think they keep the pool much cleaner, except in the case of round above ground pools. You direct the eyeball from the return to make a vortex in the pool and all the dirt ends up in the center where the main drain is, keeping the pool cleaner.
    -Kevin
    X-Pert Pool Service
    x-pertpool.com
    X-Pert Pool on Facebook and @XPertPoolServic on Twitter
    22,000 gal / 16' x 32' / Vinyl / Hayward s244t /Pentair SuperFlo 1 hp

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    In the Industry

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    Re: bottom drain

    Quote Originally Posted by JasonLion
    A bottom drain in a vinyl liner pool is likely to be just fine. However if the liner does tear around the drain you can lose all your water very quickly. It is a very rare problem, with a high cost when it does happen. I don't like that kind of risk, even if 99 out of 100 pools are going to be fine.
    I agree with Jason, there is a considerable variation in liners and although a bottom drain is fine for re-inforced liners some of the thinner ones I would not want to fit one too.

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    Re: bottom drain

    That is one of the things I like about it. My 30' pool is round and it draws everything to the center so it makes cleaning much easier.
    30' Round Vinyl AG, 21,200 K GAL. with Main drain, Hayward 1.5 HP Pump, Sand filter, BBB Method & TF~100 Test Kit

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