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Thread: pump @15 psi

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    Join Date
    Aug 2013
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    Covina,CA.
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    pump @15 psi

    i cleaned my pump out and replaced 2 grids in my filter system about 2 1/2 months ago. i noticed about 1 week ago my psi has been rising from 9 psi to 15 psi i dont think that is normal. i have been mainting all chemicals as needed. there is no d.e. coming out the jets so no other grids are damaged. how often do the grids need to be cleaned?
    15'x37' 22833 gallons, inground swimming pool, pentair FNS plus, hayward vaccum
    Covina, CA.

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    Melt In The Sun's Avatar
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    Re: pump @15 psi

    How does your water look? When pressure rises quickly, it means there's something in the water for your filter to catch.
    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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    Covina,CA.
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    Re: pump @15 psi

    my water looks clear there has been some algae along side of the pool but i brush it off pretty easy i havent had any problems with the chemicals been watching it very closely. just the increase in psi is concerning.
    15'x37' 22833 gallons, inground swimming pool, pentair FNS plus, hayward vaccum
    Covina, CA.

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    Mod Squad jblizzle's Avatar
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    Re: pump @15 psi

    Sounds like the filter is working and catching the algae. It will clog quickly with the live algae.

    Since you see algae, you need to SLAM the pool. [slam:32wvw16v][/slam:32wvw16v].

    And clean the filter when the pressure rises 25% over the clean pressure ... Sounds like that would be before 12psi.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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    linen's Avatar
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    Jul 2010
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    Re: pump @15 psi

    Quote Originally Posted by tvalenzuela
    there has been some algae along side
    BINGO...your filter is apparently working properly and filtering out dead algae. Follow the advice above.

    We recommend backwashing when the filter pressure goes up 25% from the "clean" filter pressure.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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