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Thread: Normal pressure for Sta Rite Cristal Flo

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    Normal pressure for Sta Rite Cristal Flo

    Hi all,

    First post, so please let me know if I need to change anything (will work on my sig once I have all the correct pool specs written down). I was wondering, approximately what should the normal, clean pressure on a Sta Rite Cristal Flo filter be? I'm reading about 16, and was curious if I needed to clean the sand/filter before calling it good. I backwashed and rinsed, and installed a new pressure gauge as mine was broken, and this is the first pool we have owned. Any info is greatly appreciated, along with all the other good info I have found here! Wanted to get a good baseline before trying to add DE to my filter.

    Thanks,
    Shayne
    36000 gallon IG 20x40, Heyward 1.5 HP pump, Sta-Flo II filter, 1 skimmer, no deep water suction, 4 returns

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    JasonLion's Avatar
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    May 2007
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    Re: Normal pressure for Sta Rite Cristal Flo

    Welcome to TFP!

    There is no way for us to say, every pool is different. Once you backwash or clean it and recharge the DE, note the clean filter pressure and after that clean it any time it goes up by 25%.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: Normal pressure for Sta Rite Cristal Flo

    Thanks Jason,

    I was curious since this is a sand filter, and I didn't know exactly what "normal" was for pressure. The owner's manual gave little information other than backwash when you see 5-7 pounds higher than "normal". This pool was built in 2001 with the house, and I'm reasonably sure the sand has never been changed. Just wanted to make sure I was in the fairway before I found myself in the rough!
    36000 gallon IG 20x40, Heyward 1.5 HP pump, Sta-Flo II filter, 1 skimmer, no deep water suction, 4 returns

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    Mod Squad Bama Rambler's Avatar
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    Jun 2009
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    SouthWest Alabama
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    Re: Normal pressure for Sta Rite Cristal Flo

    Since it's a sand filter, give it a good backwash & rinse and record the resulting pressure when you put it back on filter as the clean pressure.
    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
    Pool School ----- Pool Math ----- TF-Test Kit

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