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Thread: Filter DP gauge has strange readings recently? ?

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    Filter DP gauge has strange readings recently? ?

    Has anyone ever seen their DP gauge go in the opposite direction for no obvious apparent reason? My clean PSI has been 16PSI as normal for months, nothing out of specs with chemistry, pressure from jets seem to be normal. All but the obvious gauge possibly being bad,its a new pretty high quality gauge since the beginning of the season
    Its been running 12-14 lately...any ideas?
    24,000 Gallon Vinyl Grecian IG,Triton2 Sand Filter / Pentair Super Flo 1 HP Dual Speed Pump ,
    Stenner Peristaltic Pump Injection w/15 gal drum,Stubbed up supply/return for future solar panels :)
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    GreatCanadian's Avatar
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    Re: Filter DP gauge has strange readings recently? ?

    Channeled sand perhaps? I'm sure you'll get more suggestions shortly.
    13'x22'x52" 8,000 gallon ProSeries Pool with Borates
    Intex 110 pound Sand Filter with Zeobrite, 2650 gph pump, 0.95 hp
    Bestway SWG
    AquaPro ECO500 50,000 BTU heat pump
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    Re: Filter DP gauge has strange readings recently? ?

    I was planning on checking the sand condition through the top and clean it a bit with the garden hose technique this weekend....
    24,000 Gallon Vinyl Grecian IG,Triton2 Sand Filter / Pentair Super Flo 1 HP Dual Speed Pump ,
    Stenner Peristaltic Pump Injection w/15 gal drum,Stubbed up supply/return for future solar panels :)
    TF100 Rocks !! Pool School....

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    GreatCanadian's Avatar
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    Re: Filter DP gauge has strange readings recently? ?

    Wouldn't hurt to do it anyway. I bet you'll clear a lot of crud that doesn't come out in the backwash.
    13'x22'x52" 8,000 gallon ProSeries Pool with Borates
    Intex 110 pound Sand Filter with Zeobrite, 2650 gph pump, 0.95 hp
    Bestway SWG
    AquaPro ECO500 50,000 BTU heat pump
    GLI Whirlwind Solar Cover Reel, TF-100 Test Kit

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    Mod Squad Bama Rambler's Avatar
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    Re: Filter DP gauge has strange readings recently? ?

    Didn't recently replace or remove an eyeball or adjust a valve did you?
    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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    Re: Filter DP gauge has strange readings recently? ?

    Quote Originally Posted by Bama Rambler
    Didn't recently replace or remove an eyeball or adjust a valve did you?
    Other then my normal operation of my 3way jandy valve to direct my output to my polaris cleaner that's about it? But I typically use that frequently, have they caused problems for people in the past? ?
    24,000 Gallon Vinyl Grecian IG,Triton2 Sand Filter / Pentair Super Flo 1 HP Dual Speed Pump ,
    Stenner Peristaltic Pump Injection w/15 gal drum,Stubbed up supply/return for future solar panels :)
    TF100 Rocks !! Pool School....

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    Mod Squad Bama Rambler's Avatar
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    Re: Filter DP gauge has strange readings recently? ?

    If a larger eyeball was installed or one removed completely, it would lower the filter pressure.

    Also if you normally had a valve set to 75% open and changed it one way or the other, say to 80% open, that would affect the filter 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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    Re: Filter DP gauge has strange readings recently? ?

    Thanks Dave, but I've been noticing this lower pressure on the gauge when the Jandy valve is back to normal discharge to the return jets only and my cleaner our of the picture? Has there ever been issues with the jandy valve not seating in a particular position either way? ?
    24,000 Gallon Vinyl Grecian IG,Triton2 Sand Filter / Pentair Super Flo 1 HP Dual Speed Pump ,
    Stenner Peristaltic Pump Injection w/15 gal drum,Stubbed up supply/return for future solar panels :)
    TF100 Rocks !! Pool School....

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    Re: Filter DP gauge has strange readings recently? ?

    If anything got stuck or lodged on the suction side of your system (skimmers all clear?) that would reduce the psi at the filter.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Filter DP gauge has strange readings recently? ?

    Apparently my better half had left the skimmer basket out a few times for the day,and she actually admitted it and the pump strainer accumulated some stuff... usually the pump strainer is pretty darn clean and dummy me didn't even check it before posting this...oops, thanks all for your comments....Lesson learned for me, always remain teachable even with the smallest things
    24,000 Gallon Vinyl Grecian IG,Triton2 Sand Filter / Pentair Super Flo 1 HP Dual Speed Pump ,
    Stenner Peristaltic Pump Injection w/15 gal drum,Stubbed up supply/return for future solar panels :)
    TF100 Rocks !! Pool School....

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