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Thread: Water spitting out of the top of sand filter?

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    Water spitting out of the top of sand filter?

    Hey everybody. I just bought my first house and it has a pool.

    I pulled the cover off on saturday and shocked the pool and thought I was running the filter. It was running but I still had a plug in the skimmer basket. so Today I removed that plug and started up the filter again, it runs for about 30 seconds before water starts squirting out of the pressure relief valve on my hayward S200 sand filter. So as of right now the filter is off until I can get this figured out. I looked around the pool for returns thinking I still had them covered but I think there is only one and it is uncovered.


    Any ideas?

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    Mod Squad jblizzle's Avatar
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    Re: Water spitting out of the top of sand filter?

    Welcome to TFP!!!

    Are you sure it is a pressure relief valve and not the air bleed that just needs to be closed?

    Make sure you read Pool School (button at the upper right of the page) so that you understand the correct shock PROCESS.
    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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    Re: Water spitting out of the top of sand filter?

    it is a manual air relief cap, does it need to be closed? if so what is the highest pressure should I let the pump gauge go to before backwashing?

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    Mod Squad jblizzle's Avatar
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    Re: Water spitting out of the top of sand filter?

    Yes, you close it when the pump is running and water starts squirting out so that you know you got the air out.

    You should backwash when the pressure goes up 20-25% of your clean pressure ... what is your clean pressure? Does the gauge read zero when the pump is off?
    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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    Re: Water spitting out of the top of sand filter?

    the gauge reads zero when the pump is off, but I dont know what the clean pressure is

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    Mod Squad jblizzle's Avatar
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    Re: Water spitting out of the top of sand filter?

    So do a thorough backwashing and then see what the pressure is when you start on filter again.
    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
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    Re: Water spitting out of the top of sand filter?

    Awesome. sounds like a plan. Thank you!

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    Mod Squad jblizzle's Avatar
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    Re: Water spitting out of the top of sand filter?

    If you have never done it before, this post describes a way to "deep-clean" and resettle the sand. This really should be done every year or so:
    my-sand-is-channeled-how-to-fix-it-t7626.html#p60821
    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!

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