I set the suction valve to 0% spa, however the spa still drained into the pool.
I then set the suction valve to 0% spa AND set the return valve to 0% pool and the spa again still drainied into the pool.
Any other ideas what might be causing the spa to drain into the pool?
When the pump shuts off, I can hear gurgling noises coming from the filter/return pvc pipes. I see no sign of water leaks around the spa, nor around the filter or plumbing.