Posted: 4/8/2026 8:00:50 PM EDT
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It's in the line from the pump to the filter. Right where the coupler screws into the filter backwash valve. Attached File With the O-ring there, I'd assume that the threads don't need anything. But, it's always leaked. So, I've added tape, pipe dope, tape and pipe dope to the point where the valve threads cracked at the seam. This is a new valve and a new O-ring and it leaks too. Pressure is around 20 PSI (a little less right after backwashing, a little over after about a week) which it's been for the last ten years that I've lived here. Anyway, any ideas? |
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The O-ring is what does the sealing, the threads only work in keeping the union together, which leads me to believe that there is an alignment problem. I had used these on my filter setup, and the alignment, although not critical, is very important. If the faces aren't parallel, you'll get leaks. I don't know if a larger O-ring would work, as the grooves dictate the O-ring size. Since you've always had a leak, I'm thinking it's a misalignment of the pieces. |
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Originally Posted By BrianCT: Don't forget some plumbers grease. Just be sure to buy the right one that wont rot the o-ring. Don't go crazy and empty a tube of the stuff, less is more. If the O ring has even the slightest beginnings of cracks [and chlorine will dry and crack them] it WILL leak. If it's the slightest bit undersized it will leak, same with oversize as it won't ''squish'' properly. Lightly lube with silicone grease compatible with rubber and do NOT overtighten, people think cranking down until the threads almost strip wil stop a O ring leak, it won't. I didn't do water much but did literally tens of thousands of NG O rings and I will say that people [who should know better] just can't get it thru their heads how an O ring seal works. I always carefully stretched even new ones slightly to look for small cracks because that is all it took to have a leak. Same for ANY material in the groove or sealing surfaces, it took very little to create a leak. |
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I'm getting down to the last box, the others have all been destroyed...
I'm getting down to the last box, the others have all been destroyed...
