jlamb5990
Bronze Supporter
- Jan 22, 2022
- 213
- Pool Size
- 10000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
+1 on this here. I had your same issue @Pharbehind and it was that my suction side 3 way was over correcting (it was an actuator controlled valve and was roaring past the spa shut off position) and letting some water drain out of the spa main drain when the pumps were off. Check and make sure when in pool mode, that valve is lined up to completely shut off flow to the spa drains.With the spa full and the return side shut off, take some food coloring and place it in front of each jet to see if water is flowing back through them.
If everything on the return is in good order, its time to start thinking about the suction side. Are you sure the suction valve is completely in the "spa off" position. Even a slight misalignment can allow water to drain to the pool through the pump. What is the condition of the diverter in that valve?