When I switch into spa mode via iaqualink, my filter pump stops, my suction side JVA switches from pool suction to spa suction, and my return side JVA switches from pool return to spa return, then the filter pump starts up. The timing was setup properly so that the JVAs complete their movement before the pump starts.
I’ve noticed that during this transition period, my spa water level drops 1/4”. My spa loses no water during spa mode operation, or when dormant. Essentially, every time I cycle into spa mode, I lose 1/4” of water from the spa presumably into the pool and then another 1/4” going out of spa mode back to pool mode.
I believe the issue is a missing check valve on the suction side that would prevent backflow of water from my spa floor drain line to my pool floor drain line during that brief period where the two are connected while the JVA is turning. It appears that issue probably doesn’t happen on the return side because there is a check valve to prevent it. Am I correct and I should have the PB put a check valve where I indicated in the attached photo? Or do I still have much to learn about plumbing?
Thanks!
I’ve noticed that during this transition period, my spa water level drops 1/4”. My spa loses no water during spa mode operation, or when dormant. Essentially, every time I cycle into spa mode, I lose 1/4” of water from the spa presumably into the pool and then another 1/4” going out of spa mode back to pool mode.
I believe the issue is a missing check valve on the suction side that would prevent backflow of water from my spa floor drain line to my pool floor drain line during that brief period where the two are connected while the JVA is turning. It appears that issue probably doesn’t happen on the return side because there is a check valve to prevent it. Am I correct and I should have the PB put a check valve where I indicated in the attached photo? Or do I still have much to learn about plumbing?
Thanks!