Spa draining??

OCH,

Show us some pics of your equipment pad and we can point out the check valve that causes that issue 90% of the time.

Depending on your plumbing, we might be able to tell you how test if the valve is good or bad.

Thanks,

Jim R.
 
och,

The red valve and the check valve next to it are what is called a make-up line..

This allow water to go to the spa when in the pool mode. This is why your spa overflow into the pool

If you close the red valve (Good luck with that.. as ball valves last about 10 minutes) the spillover will stop. But.. if the drain down stops when the red valve is closed, it confirms that the check valve next to it is leaking.

Thanks,

Jim R.