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Thread: Filter question... I should probably know the answer but

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    Filter question... I should probably know the answer but

    My sand filter is ancient. It's so old the multiport has only backwash, winterize, recirculate and filter. I understand the new ones now have six, rinse being one of them. My question is what is recirculate for? The reason I am asking is because the valve pin broke so to backwash we have to insert a nail to attach the valve handle. I can't tell for sure if we're really returning it to filter instead of recirculate after backwashing. My husband said he's pretty sure. My water is balanced and should be sparkling by now after at least a month of shocking, testing, and running the filter 24/7. However, the return is spewing some serious cloudy water after backwashing. We've discussed sand channeling and changing the sand here and here and I know we have a filter problem, just trying to rule out operator error. Thanks a lot.
    Pool size = 24,000 gal.; rectangular 3 ft shallow, 8 ft deep
    Jacuzzi Sand Filter (can't find the model) flow rate 60, Pentair Super Flo, 1HP
    Pool is inground/indoor and white plaster, TF-100 Kit

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    Mod Squad woodyp's Avatar
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    Re: Filter question... I should probably know the answer but

    Recirculate bypasses the filter and gives you more return pressure and volume of flow.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

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    Re: Filter question... I should probably know the answer but

    Thank you woodyp. When we backwash the psi goes down, then it slowly goes back up again when in (what we think) is filter mode. Would recirculate also show increase in the pressure gauge?
    Pool size = 24,000 gal.; rectangular 3 ft shallow, 8 ft deep
    Jacuzzi Sand Filter (can't find the model) flow rate 60, Pentair Super Flo, 1HP
    Pool is inground/indoor and white plaster, TF-100 Kit

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    Melt In The Sun's Avatar
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    Re: Filter question... I should probably know the answer but

    It wouldn't. Looks like you're getting it to the right setting
    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!
    TF Test Kits -- PoolMath -- Pool School
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    Mod Squad woodyp's Avatar
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    Re: Filter question... I should probably know the answer but

    No dirt in filter (recirculate mode) equals no pressure increase.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

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    Jun 2010
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    Re: Filter question... I should probably know the answer but

    Yey, thank you both for a speedy reply.
    Pool size = 24,000 gal.; rectangular 3 ft shallow, 8 ft deep
    Jacuzzi Sand Filter (can't find the model) flow rate 60, Pentair Super Flo, 1HP
    Pool is inground/indoor and white plaster, TF-100 Kit

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