First of all let me start by saying that I am new to pools and we just bought a house that has one. I have a basic understanding of pools and can read and learn what I need, but I have a question about a problem. I have an attached spa to the pool that has the small waterfall that spills into the pool. I noticed that the pool needed to be refilled after several days. i thought it was a leak in the pool until the pump went out and I had to go 5 days without running the pump and the spa was the one draining and not the pool. I capped off all 4 jets thinking it may be one of them and it still leaks. Last night i put food coloring in and checked each jets and nothing was leaking. I do have two drains at the bottom of the spa. It appears to be leaking into one of the drains (by checking with food coloring). i then got a big cooler and drained the spa into the pool and left about 4 inches of water in the spa and then noticed that water was coming back in via the other drain. So now I am really confused. Is there any setting on the valves that could be the issue?
Thanks for any help,
here is a link to the valve setup.