Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 8 of 8

Thread: filter pressure has risen

  1. Back To Top    #1
    Jackiesorenson's Avatar
    Join Date
    Sep 2015
    Location
    San Antonio TX
    Posts
    15

    filter pressure has risen

    Hello, TFP users. I have a Pentair Quad DE 80 filter. I love it. I open it up and wash the grids with the garden hose 4 times per year. My pressure has always stayed around 10 PSI (when it reaches 20 you are supposed to clean the filter). 2 days ago, I decided to do a SLAM due to a little persistent green algae. So, before starting the SLAM I noticed my pressure was at 30 PSI! I brushed my pool, vacuumed it, then I opened up the filter and sprayed everything clean. I also opened my pumps and cleaned those, as well as soaking my Polaris bag in a solution of bleach and water. Put everything back together, added DE and my pressure is still reading 25 PSI. Any ideas? We do have very hard water coming out of the tap (300), but we have had a lot of rain this past spring (free water!). Plus, my pool is surrounded by limestone rock which I'm sure leaches calcium into my pool as the water spills over this rock. My calcium sits at 600 and I can't drain right now. I'm wondering if I need to open the filter again, and soak my cartridges in a solution of MA and water. Thanks for the help!
    Sorenson Blue Lagoon



  2. Back To Top    #2
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re: filter pressure has risen

    Algae clogs filters quickly, it might need a little more cleaning. Be careful with muriatic acid and filter cartridges, it can ruin them. I don't use it.

    More here, Re: How to clean a cartridge filter
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    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

  3. Back To Top    #3
    Jackiesorenson's Avatar
    Join Date
    Sep 2015
    Location
    San Antonio TX
    Posts
    15

    Re: filter pressure has risen

    Quote Originally Posted by pooldv View Post
    Algae clogs filters quickly, it might need a little more cleaning. Be careful with muriatic acid and filter cartridges, it can ruin them. I don't use it.

    More here, Re: How to clean a cartridge filter
    Thank you for your reply. I guess I'll just open it up and rinse with the hose one more time. It may be time for new cartridges. They are almost 6 years old.


    Sorenson Blue Lagoon



  4. Back To Top    #4
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re: filter pressure has risen

    If you do buy new cartridges I highly recommend Pleatco filters. I am very pleased with how much better my Pleatcos work vs the original Pentair filters.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    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

  5. Back To Top    #5

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: filter pressure has risen

    Well, unless I have missed something I think you need to take a look at your water chemistry. Algae forms, dies and clogs a perfectly good filter quite easily.

    My bet is if you post a set of test numbers, you will find a need to SLAM your pool.

    Filters filter. When they filter, they get clogged with debris.........remove the debris and they allow the water to flow more freely until debris clogs them again.

    Your symptoms mirror the above.......I think you need chlorine, not a new cartridge
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  6. Back To Top    #6

    Join Date
    Jun 2015
    Location
    Orange County, CA
    Posts
    139

    Re: filter pressure has risen

    Yeah, I would recommend a full breakdown where you take out all 4 filters and really clean out all the nooks and crannies. Also make sure to clean out the gauge inlet and make sure it's not clogged. New filters aren't cheap so I would definitely troubleshoot everything before dropping the cash.
    17k IG plaster pool+ spa, Stonescape mini-pebble midnight blue, marble coping, Trex and porcelain tile decking, Pentair Intelliflo VSP x 3 (filter, laminars and spa jets), Pentair IC40, Pentair MasterTemp 400, Pentair Quad DE 100, Pentair CC 150 for laminars, Intellibrite 5G LEDs, MagicStream Laminars x 3, Intellitouch i9+3 automation with Screenlogic2, IntellipH, Dolphin s300i, TFTest kit, SpeedStir

  7. Back To Top    #7
    Jackiesorenson's Avatar
    Join Date
    Sep 2015
    Location
    San Antonio TX
    Posts
    15

    Re: filter pressure has risen

    Thank you. I'll keep Pleatco in mind.
    Sorenson Blue Lagoon



  8. Back To Top    #8
    Jackiesorenson's Avatar
    Join Date
    Sep 2015
    Location
    San Antonio TX
    Posts
    15

    Re: filter pressure has risen

    duraleigh:
    I had already started the SLAM when I originally posted my question. My pool is now crystal clear and no more algae. Before the SLAM, I brushed and vacuumed the pool; then my husband opened up the filter and rinsed the cartridges with the hose and the inside of the tank. He did not check for debris in the gauge inlet. We are still seeing a pressure of 25 psi. We plan to open up the filter this weekend and look inside the gauge.
    Sorenson Blue Lagoon



Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •