I am trying to figure out why my spa keeps emptying back into my pool when the pumps not running?
I run the pump at night from about midnight until 7:00am and by 1:00 or 2:00pm I come out and my spa is half empty?
Is there a check valve somewhere that may be bad? The spa is raised about 14inches above the pool so I was thinking there has to be something to prevent the water from backflowing into the pool?
Any help is always appreciated.