The red arrow shows the pool return. The green arrows show two pipes that go into the spa return, so why there are
two of them?
And, what is the thing that circled in purple, is it a check valve for spa? It does not work, the water in the spa lowers once I turn off the pump.
two of them?
And, what is the thing that circled in purple, is it a check valve for spa? It does not work, the water in the spa lowers once I turn off the pump.