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Thread: Main drain/hydrostatic relief leak

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    Main drain/hydrostatic relief leak

    Do the hydrostatic valves leak or deteriorate enough to leak in an 8 year old salt pool? I am losing about1" a day.skimmers are tested fixed. Plumbing was tested lights tested. I cant find any cracks.Might be a coincidence but I over filled my pool before vacation.over the top. Now I have a huge leak.I live on a hill so I cant see the water table as a problem.Pool leaks the same on or off.i would let it leak down to find it but I don't want a green pool. Any suggestions.

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    nuklhed's Avatar
    Join Date
    Jul 2013
    Las Vegas, NV

    Re: Main drain/hydrostatic relief leak

    Get in there and plug it with something you know is 100% closed. If the pool stops losing water, egads. "Badluck" alright, a daunting problem. Summer has a lot of evap but you're losing quite a lot. If that's the problem, you're either going to drain, or get real good at holding your breath.
    23,000g IG plaster, slate tile and masonry cascades. Three levels, two pumps: (upper wading 12" dp, with 3.5-ft slate cascade); secondary (double 2-ft waterfall cascades); lower main swimming, two skimmers. New Ultraflex II. Hayward: 3hp pump, 4-cartridge filter. Las Vegas, NV (desert enviro). Water temp: winter avg. 45f, summer avg. 86f. Water service: private well, TDS hard @ 250+ppm but NO Ca+ !! Persistent mustard algae.

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    Re: Main drain/hydrostatic relief leak

    Can I loop or tie the 2 lines inside the skimmer together and allow the pool to circulate with the water below the skimmer box? Or will this cause a air gap and cause the pump to lose prime.

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