Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 14 of 14

Thread: High pressure with vacuuming

  1. Back To Top    #1

    Join Date
    Jan 2014
    Location
    Apple Valley, Ca
    Posts
    12

    High pressure with vacuuming

    Hello all,

    My family and I moved into this house almost two years ago in July, making this upcoming season our third summer here. The pool and filter setup was all in place when we bought the house, so some details are still a mystery. While caring for the pool has been a struggle, I've learned a lot thanks to good friends and my local pool store. Over the time though one problem has managed to confound me to this day.
    After a short period of running our automatic pool cleaner (Zodiac MX8) the filter pressure is pushing towards 30 psi. I can clean the cartridges, start it back up with the vacuum running, and within 30-40 minutes the pressure is back up again. Now if the pool is relatively clean, or just has light debris (leaves, etc) I'll get more time out of it, but if it's sand/dust that's blown in (which happens quite a bit in the desert) I only get the 30 minutes. I do not have a dedicated suction line for the vacuum, nor do I have any valves to adjust suction/flow so when the pressure goes up the vacuum stops dead.
    I've tried numerous times soaking the cartridges in dish soap overnight (found that tip on here, thank you!) but that only seems to help for a few days. I'm down to two possible conclusions...either the cartridges aren't really meant to handle the dust and dirt and the constant cleanings are just something I'll have to deal with, or I need new cartridges. Neither of these is a very pleasant idea. So my question would be, are either of my conclusions correct, or am I way out in left field? I apologize for the extended post, just trying to include as much detail as I can. Thanks in advance for any help!
    20'x40' 36,000 gallon IG plaster pool
    Pentair Quad DE 80 Cartridge filter w/ NO backwash valve
    1HP Variable Speed Pump
    Taylor K-2006 test kit
    20-25year old pool

  2. Back To Top    #2
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: High pressure with vacuuming

    Welcome to TFP!!

    I think the filter is doing what they are designed to do, trap dirt. As you have discovered, the more dirt the quicker the cartridges get "full".
    I will leave it to someone who has DE cartridges to comment on the possibility that they need replacing.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: High pressure with vacuuming

    Welcome to TFP!!!

    One question. Assuming your signature is correct, are you adding DE after you clean the filters every time? You make no mention of DE and that could be your problem.
    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
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  4. Back To Top    #4
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,999

    Re: High pressure with vacuuming

    How about a set of test results? Do you know if your chlorine consumption has risen recently as water temp increases? It is possible that you have a low level of algae in the pool that is reproducing enough to clog the filter but not enough to turn the pool green. This happens more often if CYA is high and FC levels maintained are marginally low. Per this chart, Chlorine CYA Chart.

    And welcome to TFP!
    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

    Join Date
    Jan 2014
    Location
    Apple Valley, Ca
    Posts
    12

    Re: High pressure with vacuuming

    Jblizzle, I was told that this particular cartridge filter was designed to run with and without DE, so I've only been adding DE to aid water clarity. I was worried if I added the DE and still had to clean the filter often the cost could add up quick.

    Pooldv, I don't have a recent set of test results available, but I'll get some posted as soon as I can.

    And thanks for the welcome everyone!
    20'x40' 36,000 gallon IG plaster pool
    Pentair Quad DE 80 Cartridge filter w/ NO backwash valve
    1HP Variable Speed Pump
    Taylor K-2006 test kit
    20-25year old pool

  6. Back To Top    #6
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: High pressure with vacuuming

    I would check with the manufacturer because I have not heard that about a DE filter.
    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
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  7. Back To Top    #7
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: High pressure with vacuuming

    Quote Originally Posted by jblizzle View Post
    I would check with the manufacturer because I have not heard that about a DE filter.
    The Quad D.E. Filter Installation and User’s Guide has the following requirement:



    Your filter requires diatomaceous earth (D.E. or diatomite) for proper filtration and operation. Your filter
    elements must be precoated with this material in order to protect their surfaces and provide the most efficient
    filtering action. Refer to Table 2 for the proper quantity to use with your filter. We recommend the use of D.E.
    which is sold and labeled for use with swimming pools and spas.
    I just worked with your description of the filter, so please verify that what I found is your model.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  8. Back To Top    #8

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,084

    Re: High pressure with vacuuming

    Jss,

    Welcome to the forum. I think when you test your water, you will find that the chlorine has been or is inadequate and algae is plugging your filter.

    It is a VERY common mistake to blame a filter for what turns out to be a water quality issue.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  9. Back To Top    #9

    Join Date
    Jan 2014
    Location
    Apple Valley, Ca
    Posts
    12

    Re: High pressure with vacuuming

    Tim5055, yes that sounds like it is my filter model.

    Sounds like I have two very good directions to get started in, thank you all!
    20'x40' 36,000 gallon IG plaster pool
    Pentair Quad DE 80 Cartridge filter w/ NO backwash valve
    1HP Variable Speed Pump
    Taylor K-2006 test kit
    20-25year old pool

  10. Back To Top    #10
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: High pressure with vacuuming

    You may need to do a serious cleaning of your grids at this point. See: http://www.troublefreepool.com/use-a...ers-t4086.html
    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
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  11. Back To Top    #11

    Join Date
    Jan 2014
    Location
    Apple Valley, Ca
    Posts
    12

    Re: High pressure with vacuuming

    Fantastic article, told me some things I'm thankfully doing right, and some I'm not. It seems using the Muriatic Acid on the filters is an often debated topic. I definitely need to install a backwash soon!

    Has anyone ever seen a tool that can reach down inside the cartridges to blast them off from the inside? I might have to make one....
    20'x40' 36,000 gallon IG plaster pool
    Pentair Quad DE 80 Cartridge filter w/ NO backwash valve
    1HP Variable Speed Pump
    Taylor K-2006 test kit
    20-25year old pool

  12. Back To Top    #12
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,999

    Re: High pressure with vacuuming

    I was talking to a friend about that recently. He let his dry out once and tried to blow them off with an air compressor, which blew stuff everywhere. Too bad I wasn't there to video that! Something to seal the top and bottom and then pressurize it with air or water from the inside out.
    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

  13. Back To Top    #13

    Join Date
    Jan 2014
    Location
    Apple Valley, Ca
    Posts
    12

    Re: High pressure with vacuuming

    Wow, what a difference! Did an overnight soak of my grids then charged the DE and man has that vacuum been cooking! Had to clean the grids again the next day, but not since! Pressure looks great and he's still cruising...thanks again for the tips everyone
    20'x40' 36,000 gallon IG plaster pool
    Pentair Quad DE 80 Cartridge filter w/ NO backwash valve
    1HP Variable Speed Pump
    Taylor K-2006 test kit
    20-25year old pool

  14. Back To Top    #14
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: High pressure with vacuuming

    Good to hear you got things straightened out!
    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
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

Posting Permissions

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