I have D.E flowing out of my filter as soon as pump is off.
If i change the jandy valve ( suction before pump) to spa no issues as soon as i move it to pool d.e. Starts to fill pump basket when pump is off and goes into pool via the drain.
Any ideas ???? Thinking maybe a underground suction leak..
If it was above ground would it leak in spa mode also ???
Also when i move the hayward multiport to closed no de back up into basket.
I just changed the 3 o-rings on the jandy valve no change..