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Thread: Filter Cleaning Help

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    Filter Cleaning Help

    Hi there
    I have a pentair filter with 4 cartridges and was wondering what pressure it should be running at
    It seems that when its at or around 20 my cleaner doesn't have enough suction to run effectively. When I clean the cartridges it seems like it drops to 10-12 but then shoots back up to 20 within a day or two. Why does it keep shooting up so high?

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    Mod Squad kimkats's Avatar
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    Re: Filter Cleaning Help

    The first question I have to ask is: How does your water look? What are your current numbers from you last test? How are you testing your water?

    The answers to those questions will help us answer your question about your filter.

    I will tell you that it sounds like something is brewing in your water to cause the pressure to move up that fast. You should NOT have to clean your filters that often.

    Looking forwards to seeing your answers and getting your pool work easier to do.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Mod Squad pooldv's Avatar
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    Re: Filter Cleaning Help

    Welcome to TFP!

    The last time that happened to me I had algae and had to SLAM my pool. Nothing clogs up a filter faster than algae. I had to clean mine every day for a while. Let us know the answers to Kim's questions and we can go from there.
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: Filter Cleaning Help

    Which Pentair filter do you have? Have you used any chemicals such as a floc or phosfree?

    Clean and clear, how old are the cartridges? Do you use a degreaser or just water from a hose to clean them? Usually when the pressure jumps back up within a week it's a sign the cartridges need replacement. That is of course if the pool looks good and has no issues.

    Quad D.E., do you put the D.E. back after cleaning/backwashing?

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    Re: Filter Cleaning Help

    I also have a 4 cart Pentair filter and only clean it once a year so something is going on...

    We need to know the following

    what model the filter is
    how your water looks
    what are your numbers, FC, CC, PH, TA, CH, CYA

    We can get you going so don't worry
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

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    Re: Filter Cleaning Help

    Wow! Didn't expect so much help. Thanks everyone. uploadfromtaptalk1459265374211.jpg There is a pic of my filter.
    I have had the pool about 7-8 months ( was installed in August of 2015)

    Water is currently clear. I will get the water tested today and post numbers. I cleaned it 2 weeks ago with a water flossier and it barely made any difference so I cleaned it again using Leslie's filter cleaner spray. It dropped the pressure to around 10 for a day or two and then it shot back up to 18-20. Thanks again for all help and let me know if I can answer any more questions.


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    cowboycasey's Avatar
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    Re: Filter Cleaning Help

    I am afraid we have the answer, You said you are going to get the water tested

    The pool store is not your friend when it comes to testing, they are there to make money off you, not to clear or fix your pool... the pool store numbers are no good for what you need to get your pool going.. Sorry, I know you did not want to hear that but on a good note, you found us and we will get you fixed up

    Here is what you need to do

    1. order a great test kit the TF100 is awesome but the taylor K-2006C will also work.. The stirrer and the xl option are worth every penny but you do not "have" to get them
    TFTestkits.net

    2. how are you chlorinating the pool? 3 inch pucks? liquid chlorine?

    let us know what you want to do
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

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    setsailsoon's Avatar
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    Re: Filter Cleaning Help

    Un,

    The increase in pressure represents the additional pressure drop across the filter media in your cartridge as it runs. Most manufactures recommend a maximum of around 9 psi and that's driven by the strength of the paper filter media. So your pressure level is right at the point where you risk bursting the filter or causing leakage around the sealing surfaces inside the housing. Answering Kim and other's question is your first step. If your pool is not displaying any problems with algae, floc, or other particulates then your filter elements are probably at end of life and should be replaced. If the cartridges are relatively new and plugging this quickly it may be worth an acid cleaning or soap cleaning (TSP) to see if you can revive them. In practice most experts on this site recommend cleaning your filter when pressure increases by 25%.

    My filter cartridge is about 6 months old and runs about a month before I get to the 25% increase in pressure drop. The previous filter I had lasted 2 years and pressure drop still only increased to 25% after about 3 weeks. Still serviceable but I just thought 2 years was good enough.

    I hope this helps.

    Chris
    -Chris-
    2013 In-ground plaster/pebble, screen enclosed, 12000 gal w/ Jandy 2 speed 1 HP pump, Jandy CS 200 cartridge filter, 800 gal spa w/ 1.5 HP booster pump, Solar heater, 2 LED lights in pool 1 light in spa, TF-100 test kit, The PoolCleaner Next Generation, Jandy RS-12 Automation system with iAqualink 2.0 control, Separate Hayward/Goldline Solar control

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    setsailsoon's Avatar
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    Re: Filter Cleaning Help

    Quote Originally Posted by unreeaal View Post
    Wow! Didn't expect so much help. Thanks everyone. uploadfromtaptalk1459265374211.jpg There is a pic of my filter.
    I have had the pool about 7-8 months ( was installed in August of 2015)

    Water is currently clear. I will get the water tested today and post numbers. I cleaned it 2 weeks ago with a water flossier and it barely made any difference so I cleaned it again using Leslie's filter cleaner spray. It dropped the pressure to around 10 for a day or two and then it shot back up to 18-20. Thanks again for all help and let me know if I can answer any more questions.

    Sent from my SM-N910V using Tapatalk
    Un,

    You could have a couple of things going on and first let me ditto the recommendation to do pool testing yourself. It's really very easy to do it right. I started the TFP method about 6 months ago and have become a huge fan. Several of the people that responded to you helped me get started and it's amazing how many new people they "train" every week with their technical know-how and encouragement.

    Back to your filter, with a new pool it may just be packed with fines. If it gets loaded with fines and run beyond the normal run for long periods of time at high pressure drop the fines "pack" into pores in the filter which makes it almost impossible to water clean. Chemical cleaning can help but chances are you'll still end up replacing the filter.

    I hope this helps.

    Chris
    -Chris-
    2013 In-ground plaster/pebble, screen enclosed, 12000 gal w/ Jandy 2 speed 1 HP pump, Jandy CS 200 cartridge filter, 800 gal spa w/ 1.5 HP booster pump, Solar heater, 2 LED lights in pool 1 light in spa, TF-100 test kit, The PoolCleaner Next Generation, Jandy RS-12 Automation system with iAqualink 2.0 control, Separate Hayward/Goldline Solar control

  10. Back To Top    #10

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    Re: Filter Cleaning Help

    I am using 3 pucks in a tube thing near the equipment. I think it's called a chlorinator. Holds around 10 pucks.


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    Re: Filter Cleaning Help

    Oops. Mean 3 inch pucks


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    Re: Filter Cleaning Help

    Quote Originally Posted by unreeaal View Post
    Oops. Mean 3 inch pucks

    Sent from my SM-N910V using Tapatalk
    I definitely want to start testing my own water but for now I had already gone to Leslie's so here's results.

    This is a 10k gallon vinyl pool by the way


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    Texas Splash's Avatar
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    Re: Filter Cleaning Help

    If we were to assume those numbers were accurate (and you probably know we don't) , this is what you would typically hear:
    - Increase pH to about 7.5
    - FC should be 4-5 ppm based on that CYA of 40. (The key is the correct CYA- and the pool stores get this wrong many, many times).
    - TA is fine for now
    - CH is fine (N/A for most vinyl pools)
    - Ignore everything else listed on that list below the pH

    So basically, raise pH and FC. But trusting the pool store's printout can come-back to bite you if they are way off on some things. Be careful.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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  14. Back To Top    #14

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    Re: Filter Cleaning Help

    Thanks! I have had several tests that say my chlorine is low or at zero. I keep the chlorinator full of 3 inch tablets but it is still always low chlorine in the pool. Should I just turn it to a higher number? Or do I need to shock the pool. Last time I shocked if some of it sat in the deep end and I can see where it started to fade the liner. any other tips to keep my chlorine in line?


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    Texas Splash's Avatar
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    Re: Filter Cleaning Help

    If the water is still clear with no cloudiness, you "may" get lucky if you add some bleach right away. In your 10K pool, I'd add at least 1/2 gallon of regular bleach right away, then check FC again this evening if you have any way of doing so. If not, then add another 1/2 gallon tomorrow, then taper-off to maybe 1/4 gallon each day until your kit arrives. I would remove those pucks immediately. Tablets/pucks increase CYA and also drive-down pH which are both happening to you right now. Hit the local store and buy a few jugs of regular (generic) bleach. No scents or splashless features. Just plain. It's safe for the pool.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  16. Back To Top    #16

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    Re: Filter Cleaning Help

    Appreciate the advice. Will the bleach harm the vinyl liner at all? I don't want any more faded spots.


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    Texas Splash's Avatar
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    Re: Filter Cleaning Help

    And as Casey mentioned in post #7, you must get your own test kit. See her TF-100 link or the same one in my sig below. Anything we try now might only be a Band-Aid fix if you have algae. The pool store tests just don't give us that true picture. So I would definitely make that a priority. Once you have that, you'll be amazed how well everything else flows and makes sense.

    - - - Updated - - -

    Bleach will not harm the liner as long as you have stabilizer (CYA) in there. According to the pool store ... you do. I'm guessing you do as well (to some degree) since you have been using pucks for a while. Regular bleach will be just fine.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  18. Back To Top    #18

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    Re: Filter Cleaning Help

    So using the chlorinator I have installed isn't a good thing? I shouldn't use it? Or just keep it low?


  19. Back To Top    #19
    Texas Splash's Avatar
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    Re: Filter Cleaning Help

    Most of us just leave it empty. If you ever leave on vacation or something for a few days, then it can be used. Just not on a regular basis. It's side-effects (raising CYA and lowering pH) have to be watched very closely. That's something the pool store techs typically won't tell you.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  20. Back To Top    #20

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    Re: Filter Cleaning Help

    Thanks for the help! To go back to the original topic. Any ideas why my filter pressure is going back up to 20 so quickly?


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