mikemass
0
As Mike said above, we closed the "water feature" valve after filling up the spa and the spa did not drain at all. Which meant that the water is SOMEHOW finding its way back to the pool via the jets and through the check valve.
In case anyone is confused by this statement I just want to clarify. In the photo below, ajknoll23's spa drains when the red circled valve is in position shown. When I had him rotate that valve exactly 180 deg (i.e. closed off the Spa returns completely), thereby taking the task of the check valve 100% out of play, the spa held water. This is how we came to the determination that the "leak" is coming from the return side past the check valve.
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Would I be correct in saying that it's not good for the spa to sit predominantly empty in the 110* heat though?
Right now, I am waking up, filling the spa, setting valves manually so it doesn't drain during the day, when I get home, I set the valves to where you suggested, so the the cleaning system and circulation happens, and then my equipment runs from 7pm to 5am.
Ugh. I def feel your concern there. I don't feel I can answer that confidently. What you are doing in the mornings is a good practice for the time being. One question I never asked you. When you moved into the house, was this ever not draining back into the pool? Or has been like this since Day 1?