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Thread: Intex sand filter flow diminishing

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    Intex sand filter flow diminishing

    A couple mornings I woke up and notice the flow of water seemed to be half it normally is from my intex sand filter pump. If i shut of the pump, take the cover of the basket or let some air in with the release valve, restart pump, it is back to normal. There is no dirt or leaves anywhere i can see. Its only a couple weeks old. Any ideas?

    16' round Intex Ultra Frame, Sand filter, filled May 25, 2014

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    Mod Squad zea3's Avatar
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    Re: Intex sand filter flow diminishing

    Is the pump basket completely full of water or is there an air bubble in the lid?
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    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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    Re: Intex sand filter flow diminishing

    It is completely full of water when I notice the problem.

    16' round Intex Ultra Frame, Sand filter, filled May 25, 2014

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    Re: Intex sand filter flow diminishing

    Does the pressure gauge indicate anything other than normal? Have you backwashed?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Intex sand filter flow diminishing

    The pressure gauge seems to be on the normal zone. I have not backwashed at all since the initial set up.

    16' round Intex Ultra Frame, Sand filter, filled May 25, 2014

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    Re: Intex sand filter flow diminishing

    1. Note the position of the pressure gauge.

    2. Backwash. (rinse, if available, too)

    3. Note the position of the pressure gauge after backwash.

    Always turn the pump off when changing modes.

    Report back your findings.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Intex sand filter flow diminishing

    Thanks. The pressure was about 4.5 before. I backwashed, but it only took a couple minutes to run clear. It was still at 4.5 after. Water flow is currently strong.

    16' round Intex Ultra Frame, Sand filter, filled May 25, 2014

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    Re: Intex sand filter flow diminishing

    The implication is that your psi gauge is broken and needs to be replaced. The other implication is that you need to read more in Pool School about the maintenance of your system and "The ABC's of Pool Water Chemistry" up in Pool School. You should backwash your filter each time the psi increases by 25%.....with a broken gauge, you can never do that.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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