I have not done that because the pool does not leak in a significant way without the pump running. I loose about 7/8" in a 12 hour run cycle. Overnight the pool does not drop in a measurable amount < 1/8". Because the amount of loss is so small when the pump is not running it would be hard for me to tell when the pool stoped leaking as a result of the water level droping below the level of the leak as opposed to it droping due to evaporation.
What I do know is the results of some process of elimination testing done back in May: The pool only leaks when I draw water from the skimmer/main drain. If I draw water from the jacuzzi seperate pipe from skimmer/main drain) and return it to the pool it does not leak. If I draw water from the skimmer/main drain and return it to the jacuzzi (through seperate return system from the pool return lines) there is no leak.
The first leak detection company pressurised the return side plumbing and it held 10-15 psi for 20 minutes without leaking. After I demanded he pressurize the suction side plumbing he did so to about 10 psi and it held pressure for about 2 minutes. Based on this he insists that the plumbing is not the source of the leak.
The second leak detection company used a camera to follow the suction side lines from the skimmer to the bottom of the pool main drain (which is copper btw) and from the pump to the skimmer. There was no obvious sign of a crack or hole in the pipe. He was unable to plug either the skimmer or main drain sufficently to pressurize the line above 10 psi, which he said was below the amount needed to hear the leak using listening device.
Sorry for the long windedness but I really do not know what to do next. I have epoxied the joint between the skimmer and tile, (which really did not show a leak anyway when I dye tested it) . My skimmer is two part, plastic above a copper base. I epoxied this joint too eventhough it showed no sign of leaking when I dye tested it. What's next? I am really really discouraged.
