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Thread: Rising Filter Pressure

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    Rising Filter Pressure

    My filter pressure keeps rising to over 20 psi within an hour of cleaning the filter manually. I have not been putting any DE in and am kind of lost. The pool is cloudy but I believe that is because I cannot run the filter as it should be run. I do have a slight leak on my the elbow of my return pipe coming from the switch. Any help would be greatly appreciated.

    Devin
    26,500, DE, IG, Plaster, 1 HP, Hayward Pro Grid 2420 Filter

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    Re: Rising Filter Pressure

    I also bought a brand new filter assembly for this summer and am currenly using it. New grids, top manifold and bottom.
    26,500, DE, IG, Plaster, 1 HP, Hayward Pro Grid 2420 Filter

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    duraleigh's Avatar
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    Re: Rising Filter Pressure

    Hey, Devin,

    Welcome to the forum I would bet your chlorine either is or has been inadequate and you are filtering dead algae from the pool......that's why it's clogging up so quickly because there is so much in your pool.

    Can you post a full set of test results? That will help us help you get your pool and filter cleared up.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Mod Squad Bama Rambler's Avatar
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    Re: Rising Filter Pressure

    You're ruining your filter grids if you're not putting any DE in it after backwashing it.

    Your problem is that you have algae and it's clogging the filter quickly. You're going to have to shock the pool. Remember shock is a process not a product.

    Provide us with a set of test results and how you got them.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Rising Filter Pressure

    will test the water first thing in the morning. i've noticed that when backwashing and manually cleaning the filter and sand like substance on the filter. where is the sand coming from? i shocked the pool with 3 bags of power powder plus on wednesday and when i tested the water today the chlorine was at 3.0, ph was at 7.2 total alkalinity was 130 ppm, but like i said, i will retest the water in the morning.
    26,500, DE, IG, Plaster, 1 HP, Hayward Pro Grid 2420 Filter

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    Re: Rising Filter Pressure

    Go and read pool school at the link at the top.
    As stated before, shocking is a process, not just adding bags of shock powder in pool.
    You'll need high end testing kit like a TF-100 kit or a Taylor K-2006
    Links are also in Bama sig.
    Swim n Play 21' round, expandable 72" liner, 6FT deep center, buried 14", 12,750 Gallons
    Waterway 1HP-2 speed with 22" Sand filter
    TF-100 test kit
    Thanks to TFP my pool is perfect all the time :party:
    I now suffer from Sparklypoolitis! :whoot:
    I am a Platinum contributor because I want everyone who comes here to Trouble Free Pool to have the same success that I enjoy with my pool and family.

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    Re: Rising Filter Pressure

    i also had the water tested at leslies pool supply last saturday and had to add 15 pounds of alkalinity up and 4 bags of shock, then was told to follow that up with some pool firstaid with the last chemical to clear up the cloudyness. pool has been up and running for roughly 2 weeks now and now i am running into the pressure problem. was running the filter 7-8 hours a day the first week without this problem. also if i put the de in after backwashing isn't that going to muck up my filter faster than presently, and making the pressure rise? i just dunno, this is my first year trying to have it open 24-7. any help is greatly appreciated.
    26,500, DE, IG, Plaster, 1 HP, Hayward Pro Grid 2420 Filter

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    Re: Rising Filter Pressure

    DE is what filters the water not the grids. Operating a DE filter without DE will damage the grids and may damage the filter.
    Maintain your pool at shock level based on your CYA level and continue to backwash the filer as needed.
    DE filters often clear a cloudy pool much faster than sand filters, but require frequent backwash and adding DE each time you backwash.

    Click on the links below for more info on defeating algae and the shock process.

    pool-school/defeating_algae
    pool-school/shocking_your_pool

    PSG
    poolschoolgrad

    20x40 free-form IG vinyl, 1hp Hayward superpump, Hayward pro grid DE filter, Raypak heatpump, Goldline Aquarite SWCG, Polaris 280 with booster, and tested using a Taylor K2006.

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    Re: Rising Filter Pressure

    i also had no idea i should have been using the rinse option on the switch after backwashing. it seems there really is a science to this all.
    26,500, DE, IG, Plaster, 1 HP, Hayward Pro Grid 2420 Filter

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    Re: Rising Filter Pressure

    found results from 6/25 from pool store, FAC 0, TAC 1, CH 250, CYA 40, TA 60, ph 7.2, copper 0, iron 0. will get tested again tomorrow at the pool store and post results before i buy anything.
    26,500, DE, IG, Plaster, 1 HP, Hayward Pro Grid 2420 Filter

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    Mod Squad Bama Rambler's Avatar
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    Re: Rising Filter Pressure

    Spend some more time reading Pool School. Yes, there really is a science to all this. Once you understand the science it makes sense and becomes easy to control.

    I highly recommend getting your own good test kit. I know it seems like I'm asking you to spend even more money and I am but it will be more than worth it to know your levels. There have been lots of reports of pool store testing being wrong.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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