[Chuck v]

Rusty,

When trying to trace a leak of this sort, it can be useful to try to get some idea of how fast the water pressure in the self contained system is being lost (how fast the water is leaking...) This is done without any fresh water hook-up connected, so the internal tank system is the only one active.

When you turn on the pump and it comes up to pressure and turns itself off -- how long does it take before it runs again? With all the faucets turned off and no leaks, it should not run again for many hours, if ever. In addition to looking for leaks at the plumbing fixtures and at the piping joints, there is also the possibility that the check valve at the fresh water hook-up is leaking.

Of course, if the pump does not run then you don't have a leak on the pressurized side, and if the tank is still really loosing level it must be upstream of the pump (in the tank wall/floor itself or the piping feeding the pump...)

Good luck, and let us know what you find.

Chuck