We recently had a fairly good little cold snap here in Austin, TX with some below freezing temps - nothing that lasted more than 12 hours, but my problem coincides with this which is why I mention it.
Note that my circulation pump and boost pump (for the Polaris) are cold protected by the automation system and kick on periodically when the temperature drops below 38F.
I essentially have three "water levels", call them A, B and C, in decreasing height.
A = level of water in the spa when it is full
B = level of water in the valves at the equipment pad
C= level of water in the pool
I let my spa lose water until it stopped - it's a pretty slow leak - it stopped a few inches above the spa jets, which seemed like an odd place for it to stop, but it turns out that is level B.
I have not seen any damp areas or water anywhere. I am almost certain that the water from the spa is leaking into the pool, but the volume difference is so big it's hard to tell. Do they make a dye that would help me tell for sure?
Based on what's happening, I surmise that there is a leak in one of my Jandy valves (suction or return) that is allowing
the spa water to drain back to the pool and it stops when the spa water reaches the level of the valves and equalizes.
Do the experts on here think I'm on the right track? Any suggestion on which of the two valves might be the culprit?
And if so, what should I be looking for when I disassemble and inspect the valve?