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Thread: High DE filter pressure, low water output..

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    High DE filter pressure, low water output..

    I'm completely at my wits end with this situation and I have tried everything.

    So with a clean DE filter, main pump basket, and skimmer baskets the pressure gauge and water return output is normal. After 30minutes pressure gauge increases and output decreases.

    I have checked for clogging in skimmer lines, replaced suction side 3 way valve and suction side flapper valve. Thinking it was my pool pump (making noise), I replaced it as well....but the problem remains. Also spa drain slowly at time and constantly have to diver water to fill flapper chamber to to spa water feature.

    Bother skimmers get good suction independently, but with one open and the other is opened I get air/lack of flow to the pump and pressure drops.

    Only thing I can think is main drain has a clog?
    Inground gunite 15,000gal with water fall spa, US Motors Ecotech variable speed 3hp pump, chlorine 6lb DE filter.

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    Mod Squad jblizzle's Avatar
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    Re: High DE filter pressure, low water output..

    What does your water look like?
    You put DE into the filter right?
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Richard320's Avatar
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    Re: High DE filter pressure, low water output..

    Pressure increasing isn't caused by low flow in the skimmers or sucking air. That's a restriction after the impeller. That usually means the filter is dirty. Is your water really cloudy or green? That'll load up a DE filter in a big hurry, exactly the way you describe.

    Overloading the filter with DE can also shorten the cycle time between backwashing. It never all comes out. When you say "clean DE filter" do you mean disassembled and sprayed clean with a hose, or just backwashing? If you're just backwashing, a good cleaning might be due.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: High DE filter pressure, low water output..

    Water was pretty dirty after getting 20inches of rain and dirt in Texas. Filter is clean (cleaned this morning) disassembled and cleaned and recharged the filter with proper amount of DE. Problem is I can't properly clean/filter pool because after 1hr pressure is high and output is zero.
    Inground gunite 15,000gal with water fall spa, US Motors Ecotech variable speed 3hp pump, chlorine 6lb DE filter.

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    Mod Squad jblizzle's Avatar
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    Re: High DE filter pressure, low water output..

    Sounds like the filter is doing its job at cleaning up the pool. DE filters are very efficient to the point of being annoying
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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  6. Back To Top    #6

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    Re: High DE filter pressure, low water output..

    At this rate I will need to disassemble and clean the filter every 20minutes...
    Inground gunite 15,000gal with water fall spa, US Motors Ecotech variable speed 3hp pump, chlorine 6lb DE filter.

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    Richard320's Avatar
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    Re: High DE filter pressure, low water output..

    The curse of the highly efficient DE filter and a filthy pool.

    If that filter has a multiport valve, you have some options. Use recirculate a while and let the stuff settle and then try to vacuum to waste. If not, you're stuck backwashing every hour.

    PS: Don't be tempted to run the filter without DE to simulate recirc. You'll just ruin the grids.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Isaac-1's Avatar
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    Re: High DE filter pressure, low water output..

    Would you prefer spending 3 weeks with a sand filter removing the junk from the water that your DE filter could do in a day or so with enough cleanings?
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
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