Hydrostatic valve

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bhubb

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Jan 4, 2016
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I have a very slow leak in my pool, that I have isolated to the drain and/or deep liner. My theory is I have a hydrostatic valve that is stuck open (pool is 9.5' deep so possible to have one in a vinyl?) because water is draining to a certain level and then immediately stopping (not dependent on pool level so not in side of liner). We had a ton of rain the last week and I had little to no water loss - assume because water table was high and equalizing the leak.

When I opened the pool there were THOUSANDS of dead earthworms in the deep end by the drain... yes could have floated down and died but could have come up from an stuck valve but they were in the drain as well because when I turned on the pump they immediately filled the basket? I have never seen that so not sure, anyone experienced?

I am going to leak test the valve/plug in the main drain (not sure what I have as I have never opened it) but curious are these universal sizes or how can I get one that will fit IF I determine the leak is there?

Also if there is no valve is there a square plug in place? Odds of those leaking would be slim I would guess?
 
bhubb said:
I have a very slow leak in my pool, that I have isolated to the drain and/or deep liner. My theory is I have a hydrostatic valve that is stuck open (pool is 9.5' deep so possible to have one in a vinyl?) because water is draining to a certain level and then immediately stopping (not dependent on pool level so not in side of liner). We had a ton of rain the last week and I had little to no water loss - assume because water table was high and equalizing the leak.

When I opened the pool there were THOUSANDS of dead earthworms in the deep end by the drain... yes could have floated down and died but could have come up from an stuck valve but they were in the drain as well because when I turned on the pump they immediately filled the basket? I have never seen that so not sure, anyone experienced?

I am going to leak test the valve/plug in the main drain (not sure what I have as I have never opened it) but curious are these universal sizes or how can I get one that will fit IF I determine the leak is there?

Also if there is no valve is there a square plug in place? Odds of those leaking would be slim I would guess?
Click to expand...
Worms are always on a suicide mission in the rain. They didn't come from below the pool.
 
A bucket test would be in order. Evaporation can be ambient air and or wind dependent which may give you the false leak stopping theory. I think if it were a hydrostatic valve leak it wouldn't stop which I'm not sure the liner pool has. I have one pool (gunnite) which is in a high water table zone and water was rising from the winter/spring rains.
 
Well I ended up diving down and had no leak in the drain, which I am glad - also I do not have a hydrostatic valve so learned something. I found one small knick on the sidewall and patched it so will monitor now
 
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