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Thread: Filter PSI never rises past 13

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    Filter PSI never rises past 13

    Hello all
    We have a new (last spring) ig gunnite pool with a de filter.
    Is this normal that the psi always is 12-13?
    Water is perfectly balanced and pool is clear.
    Because it never rises I just backwash about every 3-4 weeks or so.
    Thanks

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    Mod Squad Bama Rambler's Avatar
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    Re: Filter PSI never rises past 13

    When you shut the pump off does the gauge go to zero?

    If the pressure isn't rising there's no need to backwash. I can go several months without backwashing.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Re: Filter PSI never rises past 13

    Hi Dave
    It does go right down to zero when off.
    I guess I've been wasting DE and water with my prophylaxis backwashes.

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    Mod Squad woodyp's Avatar
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    Re: Filter PSI never rises past 13

    Pretty sure I've read on here that it is still a good idea to at least do what a call a "mini-backwash" on occassion just to keep the sand from channeling--------whatever that is!
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
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    Re: Filter PSI never rises past 13

    Pretty sure I've read on here that it is still a good idea to at least do what a call a "mini-backwash" on occassion just to keep the sand from channeling--------whatever that is!
    On it's face, that would seem to make sense but, as nearly as I remember, there has been only one reported case of channeling that truly existed since this forum has been in operation. Even if there's a few more, I don't think channeling deserves the credit we give it on the forum.

    What SHOULD get more attention is that at startup, the filter should be opened up and the sand bed cleaned and "re-fluffed" and inspected. That would probably eliminate any channeling, reduce your chlorine consumption, and be an overall healthy step in pool maintenance.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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