Ok I replaced the check value but spa water is leaking down to the pool level each night. Could the be an issue with the Jandy valve actuator? I notice the other night when in the spa with it on that I was getting a little bit of flow out of my pool sunshelf bubblers and that the level in the spa was going down slightly. Jandy valve acuators are moving and lining up correctly, could it be something inside? Is replacement needed? Pool was built in 2006. Thank you.