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Thread: Backwash on 1/2 Speed

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    Join Date
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    Backwash on 1/2 Speed

    I have a variable speed pump and am wondering if it's ok or effective to backwash at half speed? My line drains into an area of my yard that gets all disrupted when I do it at high speed. Thx.
    22,000 gallon IG plaster pool, raised spa w/spillover, variable speed EcoStar pump, natural gas heater, 60 SF DE filter, SWG (all Hayward), AquaLogic automated controller, Kreepy Krawly, TF-100 Test Kit

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    Mod Squad jblizzle's Avatar
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    Re: Backwash on 1/2 Speed

    You have a very large pump so there is a very good chance that half speed would be a sufficient flow rate to backwash the sand effectively.
    Jason, TFP Moderator
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    Re: Backwash on 1/2 Speed

    It's actually DE not sand, so would that make it more likely to be okay?
    22,000 gallon IG plaster pool, raised spa w/spillover, variable speed EcoStar pump, natural gas heater, 60 SF DE filter, SWG (all Hayward), AquaLogic automated controller, Kreepy Krawly, TF-100 Test Kit

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    Mod Squad jblizzle's Avatar
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    Re: Backwash on 1/2 Speed

    Sorry I can't see signatures on Tapatalk. It still might be fine. Although I've kind of lost faith in the ability of De filters to be back washed and really they should be broken down.
    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
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    Richard320's Avatar
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    Re: Backwash on 1/2 Speed

    I'd have to agree jblizzle. I backwash for a brief period of time, maybe thirty seconds, to loosen the obvious stuff. Then I open my filter and blast the screens with a spray nozzle and reassemble and then backwash again to finish. I suppose it helps that my filter has an internal backwash that drains out the bottom. If yours does too, then low speed should be plenty of flow.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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