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Thread: pipe size question

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    pipe size question

    I have a pool that was made with 1 1/2 inch pipes. I really should have had 2" but it wasn't designed very well so that's what I have to work with. The pipes are in cement so there isn't much hope of fixing that. I am replacing the filter which is undersized with a swimclear 2030. I an trying to decide how much pipe I should replace with 2" pipe since that is what the 2030 takes. I can go direct from the pump to the filter with only 2". The output from the filter will be 2" but then it will need to go down to 1 1/2 at some point. If there is enough benefit I could rebuilt quite a bit and do 2" for several feet after the filter but that will mean that I have to buy a new flow switch and fittings for the SWG that is installed. Is there a problem with the filter having only 2" before the filter and some 1 1/2" after the filter? any input would be appreciated.
    I have a 25K IG pool (concrete)
    I live in the Caribbean with poor infrastructure and lose power often.
    Hayward pump, Hayward clear star plus cartridge filter
    New to pool ownership

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    mas985's Avatar
    Join Date
    May 2007
    Pleasanton, CA

    Re: pipe size question

    s there a problem with the filter having only 2" before the filter and some 1 1/2" after the filter?
    No problem. You can replace as much or as little as you want to. In the big picture it probably won't make that much of a difference. In fact, if you have a single speed or two speed pump, it will actually use more energy but of course at a slightly higher flow rate.
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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