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Thread: Pentair Back Wash Valve

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    Pentair Back Wash Valve

    All of our pool equipment is Pentair. Yesterday I notice our back wash valve is leaking at the top. This is the second time this has occurred. We had it replaced under warranty back in January. (Pool is less than a year old). Has anyone else had any issues with this back wash valve? I am a little concerned. I have the warranty folks coming out this week again.
    32' 4" by 22' 4" Free Form Gunite Pool. 478 Sq Ft surface area, 95' perimeter, 14,895 Gallon Play Pool. Pentair SVRS, 60 Sq ft DE Filter, Pentair 3/4 HP Booster Pump. 500 Watt LED light. Tegulia Table, Tanning Ledge and 3 Step entry. Plaster: Wet Edge Satin Matrix - Anitgua

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    JoyfulNoise's Avatar
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    Re: Pentair Back Wash Valve

    Seems like you Texas folks are going through backwash valves a lot - Leaking push/pull backwash valve

    It is possible to rebuild them if you're handy. Question - do you backwash a lot?
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: Pentair Back Wash Valve

    I have backwashed 3 times. First time it went out after the 2nd back wash. This time after 1!!!! Not good.
    32' 4" by 22' 4" Free Form Gunite Pool. 478 Sq Ft surface area, 95' perimeter, 14,895 Gallon Play Pool. Pentair SVRS, 60 Sq ft DE Filter, Pentair 3/4 HP Booster Pump. 500 Watt LED light. Tegulia Table, Tanning Ledge and 3 Step entry. Plaster: Wet Edge Satin Matrix - Anitgua

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    JoyfulNoise's Avatar
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    Re: Pentair Back Wash Valve

    I have a Pentair QuadDE-100 for the last four years....same backwash valve....no leaks (knock on wood). Then again, I don't really backwash. If you install a large enough filter, then you can simply tear it down twice per year and not mess around with backwashing.

    Also, if you follow TFP's recommendation, you should only be backwashing the filter when the pressure has risen 25% over clean pressure. So for a 10psi clean pressure, one would wait until 13psi to backwash. Many other sites and PBs recommend you either wait until the pressure difference is astronomical (like 10psi over clean pressure) or they suggest you backwash on some frequent basis like monthly. Neither of those recommendations are appropriate.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: Pentair Back Wash Valve

    Quote Originally Posted by Sportsgram View Post
    I have backwashed 3 times. First time it went out after the 2nd back wash. This time after 1!!!! Not good.
    Same here...it's not like I backwash 20 times and it eventually starts leaking...AFTER EACH TIME?!...I'm just going to have warranty repair it again...maybe after enough times, they'll figure out why it's failing after each use.


    Matt- IG gunite pool and spa built Summer 2016: 32' x 20' overall with two 4' x 8' tanning ledges. 6'x6' attached spa with spillover. Depth 3' to 5' to 4'. 16.4K gal. Lueders Limestone retaining wall and coping. Equip: Pentair SVRS vari. speed pump. Pentair 60 sq. ft. DE filter. Pentair Kreepy Crawly Plat. cleaner. Pentair MasterTemp 400,000 BTU NG heater. 1.5 HP spa air blower. Nature2 Sanitizer. Taylor K-206C. My 2016 Build

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    Re: Pentair Back Wash Valve

    I hear you. That is what I am doing.
    32' 4" by 22' 4" Free Form Gunite Pool. 478 Sq Ft surface area, 95' perimeter, 14,895 Gallon Play Pool. Pentair SVRS, 60 Sq ft DE Filter, Pentair 3/4 HP Booster Pump. 500 Watt LED light. Tegulia Table, Tanning Ledge and 3 Step entry. Plaster: Wet Edge Satin Matrix - Anitgua

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    Re: Pentair Back Wash Valve

    Just wanted to give an update. Warranty company came out and initially replaced the manifold and the valve. Continued to leak DE into pool. Came out the next week and replaced the grids. No more leakage.


    Matt- IG gunite pool and spa built Summer 2016: 32' x 20' overall with two 4' x 8' tanning ledges. 6'x6' attached spa with spillover. Depth 3' to 5' to 4'. 16.4K gal. Lueders Limestone retaining wall and coping. Equip: Pentair SVRS vari. speed pump. Pentair 60 sq. ft. DE filter. Pentair Kreepy Crawly Plat. cleaner. Pentair MasterTemp 400,000 BTU NG heater. 1.5 HP spa air blower. Nature2 Sanitizer. Taylor K-206C. My 2016 Build

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    GDN's Avatar
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    Re: Pentair Back Wash Valve

    Equipment has only been running about 18 months, full Pentair as well, just yesterday water started leaking out the top of the valve. Figure I'll call the pool company tomorrow and see what they are willing to do. Don't know if they'll replace or rebuild. I don't know that I want it cut out of all of the plumbing, but if they are only going to rebuild I could probably do as good a job myself.

    I have back washed probably 8 to 10 times. The pressure gauge doesn't go up as much as some note that it should before backwashing, but I can tell water flow is way down by my how much water I get coming out of the spa waterfall. With a Live Oak tree over part of the pool and the amount of stuff I get in the pool I figure it really needs the back-washing, but I could still be over doing it.

    Have they replaced your valve or rebuilt it?
    Greg -
    11K gal, IG Pebble Sheen (Aqua Blue) with sun ledge and attached spa, Pentair Intelliflow 3050 VS/SVRS (3HP), Pentair ET 8 with Screen Logic, Pentair Racer with 3/4 HP booster pump, 400KBTU Pentair Mastertemp, Pentair 60 sq ft DE filter, J&J Intellibrite LED in spa, Zodiac Nature 2 (not used), Stenner pump/liquid Chlorine, build completed in August 2015

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    Re: Pentair Back Wash Valve

    Quote Originally Posted by GDN View Post
    Equipment has only been running about 18 months, full Pentair as well, just yesterday water started leaking out the top of the valve. Figure I'll call the pool company tomorrow and see what they are willing to do. Don't know if they'll replace or rebuild. I don't know that I want it cut out of all of the plumbing, but if they are only going to rebuild I could probably do as good a job myself.

    I have back washed probably 8 to 10 times. The pressure gauge doesn't go up as much as some note that it should before backwashing, but I can tell water flow is way down by my how much water I get coming out of the spa waterfall. With a Live Oak tree over part of the pool and the amount of stuff I get in the pool I figure it really needs the back-washing, but I could still be over doing it.

    Have they replaced your valve or rebuilt it?
    They replaced it.


    Matt- IG gunite pool and spa built Summer 2016: 32' x 20' overall with two 4' x 8' tanning ledges. 6'x6' attached spa with spillover. Depth 3' to 5' to 4'. 16.4K gal. Lueders Limestone retaining wall and coping. Equip: Pentair SVRS vari. speed pump. Pentair 60 sq. ft. DE filter. Pentair Kreepy Crawly Plat. cleaner. Pentair MasterTemp 400,000 BTU NG heater. 1.5 HP spa air blower. Nature2 Sanitizer. Taylor K-206C. My 2016 Build

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