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Thread: Replacing Sand Increased Pressure????

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    Replacing Sand Increased Pressure????

    My husband spent the day yesterday replacing the sand in our sand filter. Once completed, we backwashed and rinsed and then let it rip. However, we were surprised to see the pressure gauge running at 24-25 psi. It's important to note that we did have to also replace the pressure gauge as the other stopped working. However, when it worked last year it ran at 19psi and we backwashed when it hit 24-25.

    So my questions are:
    Is it normal for psi to increase upon replacing the sand in the sand filter?

    If it is not normal, could it be the difference in pressure gauges?

    If "no" to both questions, any ideas what the cause if increased pressure could be?

    TIA
    14.5'x32' irregular shape Pebble Tec SWG pool; 12,000 gal; Purex Triton Tagelus Sand Filter; Pentair IntelliPh Ph Controller

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    Re: Replacing Sand Increased Pressure????

    It could be that there is more sand now. That would do it.

    24-25 is a little high for most systems. I think I would backwash once more and see if it lowers.

    What size pump and what size filter do you have?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Replacing Sand Increased Pressure????

    It is a Purtex Triton Tagelus TA-60/60D
    Design flow rate - 60
    Maximum psi - 50

    It has a Polaris booster, saltwater chlorine generator, and muratic acid feeder attached if that helps.

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    Re: Replacing Sand Increased Pressure????

    What size pump?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Replacing Sand Increased Pressure????

    Sorry about that...

    1 horsepower
    Amps 14..6/7.3

    Is that what you need?

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    Re: Replacing Sand Increased Pressure????

    Yes, that's sufficient. Your filter is a little small for that pump but not outrageously so.....I would expect your clean psi to be less than 20.

    Do you have solar panels?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Mod Squad YippeeSkippy's Avatar
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    Re: Replacing Sand Increased Pressure????

    Does the pressure gauge read zero when the pump is off?

    Maddie
    Maddie :) 12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Skippy's Pool Cooler --> Skippy's New Fountain Our Build --> Our Pool Solved Our Sloping Yard

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