Water level on Spa (attached to pool) drops when not used

[davidyal]

Our spa/pool was recently remodeled. Full pressure test done before it started. Two of the spa jets were leaky and fixed.

The pool equipment and pool itself sits lower than the Spa, so gravity tends to flow water back towards equipment.

When the pump is running the water flows up thru fountain plumbing and spills over from spa into pool.

When the pump isn't running the water level typically holds high in the spa near the same place when the pump was turned off.

However, during cooler weather (50s) the level seems to be dropping a few inches per day when pump is off. I've changed all the check valves but it's still happening. I'm thinking that in cooler weather some seal is contracting slightly. Could it be inside a diverter valve? ideas?

 

[ajw22]

Tell us where your check valves are located in the plumbing flow.

The check valves should be before water gets to any diverters so diverter leakage should not be a factor.

 

[RDspaguy]

Can't have a check valve on the spa suction that starves the pump, so unless the check valve is on the pool suction it could be the suction side jandy valve. If the valve rests in pool mode overnight even a pool suction check valve wouldn't stop it from returning to the pool.

 

[Jimrahbe]

David,

Show us several pics of your equipment pad, so we can see all the valves and associated equipment.

90% of the time, the problem is with the check valve on the pipe going to your spa jets.

When your pump is running, and the spa is overflowing into the pool, does the water enter your spa from the spa jets or some other way?

Thanks,

Jim R.