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Thread: Press which Rising Quickly on Pentair Clean and Clear

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    Press which Rising Quickly on Pentair Clean and Clear

    I have a 23K gallon pool, new owner of pool that is having trouble understanding why my pressure gauge keeps rising. (Pentair Clean and Clear 420)Starting is approx 20 PSI but within hours, rises to 30PSI or higher. As a result, the pool cleaner stops moving. When we first had pool installed, starting pressure was about 15PSI. I have cleaned the filters twice in the past two weeks including soaking overnight and rinse throughly with a cartridge filter spray attachment. We have a small, recurring algae issue which seems to resolve but re-occurs when we heat the pool beyond 80 degrees. (Not sure if this has anything to do with it). Anyways, cleaned the filters approximately 3 hours ago and restarted. Pressures were 20 to start. It is now over 30PSI. The pool is a year old so I cannot imagine needing new filters but also don't want to replace filters if not needed.

    1HP Pentair Pump
    Pentair Clean and Clear 420
    Ozone Cleaning
    Nature 2

    PH 7.2
    Chl 1.5
    TDS 2400

    Thanks for the help!

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    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Press which Rising Quickly on Pentair Clean and Clear

    Welcome to the forum. Your issue is commonly posted. The filter is doing exactly what it was designed to do.....filter out the debris in your pool. It is clogging quickly because you have a lot of debris....seen or unseen.

    The probability that the debris is algae is very do not have nearly enough chlorine in your pool to prevent it.

    The solution is to SLAM the pool. read "SLAM - Shock Level And Maintain" in the How To section of Pool School. You must follow that article precisely and your filter issues will stop....eventually.

    Unfortunately, the SLAM process is designed to kill all the remaining organics in your pool so, while you are in the process, the filter is very likely to get clogged even more quickly than now. Eventually, you can go longer and longer between cleaning.

    No one here on the forum thinks Nature@ and ozone are a good idea and I believe they have contributed heavily to your problem. That's another subject but your filter issues will come right back if you fail to maintain adequate chlorine and rely on those two to keep your pool clean and sanitary.

    You should clean your filter any time you see a 25% rise in psi.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    y_not's Avatar
    Join Date
    Jul 2012
    Redmond, OR

    Re: Press which Rising Quickly on Pentair Clean and Clear

    You'll also need a proper test kit for your pool, in order to clear it up and fix your problem.

    See my sig for a link to the test kits compared. The link is titled "TF100 Test Kit".

    Please fill in your sig as instructed in PS, 1st link, also your location in your profile under user control panel.
    Thanks for reading... - Tony
    Da' Pool: Intex 15'x42" 3284gal AGP EasySet (Inflatable Ring) - (Summer 2014: 27' round EW /w 6.5' deep end @ 22,500gal)
    Pump & Cart Mod: 1000gph Cart. 5ft² - 2 nylons, 24/7 OP. Traps bugs/bits, lasts longer/cleans easier = Happier Pool Owner!!
    The Bible for a "Trouble Free Pool" life = PoolSchool, the BBB method a TF100 test kit(Recommend Kits Compared). - Cleaning a Sand Filter
    Water looks like GLASS, if yours doesn't...SLAM IT! Feels nice and never been happier!!! :D

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    Re: Press which Rising Quickly on Pentair Clean and Clear

    K thank you. Just curious, the issue with Ozone and Nature 2? Should I just disable it?

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    Re: Press which Rising Quickly on Pentair Clean and Clear

    Outdoor 14,000 gallon IG plaster pool built in 2000 with spillover spa, 2 hp WhisperFlo pump with MagneTek motor, Sta-Rite cartridge pool filter with 300 ft2 filtration area and 0.33 gpm/ft2 filtration rate, Aquabot Rapids 4WD robotic pool cleaner, Raypak digital gas heater, and Intermatic mechanical timer located in the Dallas-Fort Worth metroplex

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