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Thread: Plumbing - 1.5" vs 2"

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    Plumbing - 1.5" vs 2"

    I am in the end stages of PB selection and coming to the fine details. This is for an 18x36 mountain pond, about 25k gallons. One PB is using one skimmer and 1.5" plumbing with 1HP super pump. The other has standard 2" plumbing with two skimmers and a 2HP super pump. Both same pool? Either right or wrong?

    Thanks!

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    tgmb's Avatar
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    Re: Plumbing - 1.5" vs 2"

    2" plumbing will give you higher turnover, with higher turnover rates; which is better for filtration. Additionally, two skimmers gives you more debris removal. I would recommend the 2" setup. Here is a table you may find helpful, describing flow rates:
    http://flexpvc.com/WaterFlowBasedOnPipeSize.shtml And here is a page explaining turnover and turnover rates:
    http://ppoa.org/?page_id=463 Of course, safety covers over two drains would be necessary.

    Disclosure: I have 1.5" plumbing with 1 skimmer; it's adequate, but I would prefer a 2" with 2 skimmer setup for the above named reasons.

    Tom
    20k gal. 36' In ground Med. Blue plaster, two-speed EcoPump EP6, Pentair 3.14 sq. Ft. Sand w/zeosand, Spectralight SL 500, RayPak 2100 heater, Polaris 360,GE Timer 15087, Borates 80 ppm.

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    Re: Plumbing - 1.5" vs 2"

    PB compromise was two skimmers w/ 1.5" plumbing and 1HP hayward superpump. Will this be sufficient?

    Thanks!

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    Melt In The Sun's Avatar
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    Re: Plumbing - 1.5" vs 2"

    Any water features (fountains, waterfalls, etc) with the pool? 2 hp is much too big, unless you have a spa or a big waterfall. 2" is better, and there's no reason why any pool builder should resist it.

    If you don't have any water features, I would suggest a 2-speed 1 hp pump.
    11,200 gal, Pebble-Tec; Tristar 2-speed 1hp - Swimclear 325 ft2 cart - SWG - A & A in-floor cleaner - Heat pump. For the poolside cooking, a Yoder Wichita and a Big Steel Keg!
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    dmanb2b's Avatar
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    Re: Plumbing - 1.5" vs 2"

    Quote Originally Posted by Melt In The Sun
    Any water features (fountains, waterfalls, etc) with the pool? 2 hp is much too big, unless you have a spa or a big waterfall. 2" is better, and there's no reason why any pool builder should resist it.

    If you don't have any water features, I would suggest a 2-speed 1 hp pump.
    Ditto...2" plumbing and any pump over 1HP is overkill, unless there are water features. The 2sp 1hp with 2"plumbing would allow for energy savings and an efficient set-up.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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