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Thread: Low return pressure in pool

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    Low return pressure in pool

    I have an above ground pool with a sand filter. My filter cracked and I replaced it with a larger filter due to a price I couldn't pass up on. I notice that after about an increase of 5 psi (from 10 - 15 PSI) the return flow is very weak and I have to backwash. It can't get pass an increase of 5 PSI. I am thinking that my pump is under-powered for the filter. I was told by the seller that the 1.0 HP pump I have would be fine but I think I may need to upgrade to the 1.5. Am I on the right track or could it be something else? I have checked for obstructions including in the impeller and there are none. I just wanted to get some other opinions before I go buy another pump. If more info is needed please ask and I will go outside and get the specs.
    15,000 gallon Doughboy above ground pool that has been set in ground, Sequel II DE filter, Hayward 1.5 HP Pump, (5) 4' x 10' solar collectors on roof, with a WiFi solar controller.

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    duraleigh's Avatar
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    Re: Low return pressure in pool

    How long does it take (minutes? hours? days?) for your psi to go from 10 to 15
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Mod Squad woodyp's Avatar
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    Re: Low return pressure in pool

    You generally need to backwash when your pressure rises 25%......in your case, it's 50% Maybe the sand needs to settle out some to if it's new.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
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    Re: Low return pressure in pool

    It can take a few days or longer to increase 5 PSI. I don't think anything is too odd there. I have had it for almost 2 months.
    15,000 gallon Doughboy above ground pool that has been set in ground, Sequel II DE filter, Hayward 1.5 HP Pump, (5) 4' x 10' solar collectors on roof, with a WiFi solar controller.

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