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Thread: hairline crack in psi gauge housing on filter...

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    Join Date
    Aug 2007
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    hairline crack in psi gauge housing on filter...

    I overtightened a new psi gauge at the top of my sand filter and now have a hairline crack. I was able to seal it for a couple weeks with some marine silicone I had at the house, but now the leak has found its way through the silicone. What should I use to seal this tiny crack in the plastic? I have some JB weld at the house, wondering if that'll bond to the plastic? Is there another epoxy, or sealant you guys would suggest to form a permanant bond with the plastic of the crack?
    24' AGP vinyl, 3/4hp Pentair 2-speed, Pentair Quad DE 60
    Pool Rover Jr.
    TF-100

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    Richard320's Avatar
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    Jan 2010
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    San Dimas, CA (LA County)
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    Re: hairline crack in psi gauge housing on filter...

    Is it the filter housing, or the airbleed/gauge adaptor? I had a teeny dribble that I thought sure was the tank, and I was afraid to try tightening it anymore. Turns out a $13 gauge/bleed assembly fixed it just fine.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Aug 2007
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    Re: hairline crack in psi gauge housing on filter...

    its the housing. I cracked the plastic on the outside of the threads by overtightening the actual gauge. I can clearly see the crack in the plastic.
    24' AGP vinyl, 3/4hp Pentair 2-speed, Pentair Quad DE 60
    Pool Rover Jr.
    TF-100

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    Join Date
    Jun 2010
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    Fremont, CA
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    Re: hairline crack in psi gauge housing on filter...

    What about next repair using a proper sized hose clamp around the gauge housing? I don't think you would have to tighten the hose clamp real hard, like you do on a radiator hose. Just slightly snug, I would think help hold the next repair in place.

    And how about epoxy instead of silicone ?
    40 x 16 (28k gallon) plaster pool, Intelliflo VF pump, Hayward 48 sq. ft. DE filter, using Purifiber, using BBB, TF-100 test kit

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    X-PertPool's Avatar
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    Jun 2009
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    Exeter, PA
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    Re: hairline crack in psi gauge housing on filter...

    I repaired a couple of these this year on top mount Hayward sand filters. If you really need a pressure gauge insert the pressure gauge then seal around it with plastaid or ab putty. A stronger repair is to remove the gauge And use a threaded plug instead. Put plastaid on the threads and tighten plug til snug and deep then seal over entire plug with plastaid. I rarely look at gauges and judge pressure based on flow rate back to pool
    -Kevin
    X-Pert Pool Service
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    22,000 gal / 16' x 32' / Vinyl / Hayward s244t /Pentair SuperFlo 1 hp

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