Spa Spillover Not Spilling Over

[Scottc19]

Hi All - Looking for some guidance and feedback from the group. I have a raised spa setup for continuous spillover into the pool. Since opening this season, though, the spa is not consistently spilling over and spa level is dropping an inch or so below the spillover level. It will spillover when the variable speed pump runs at its high speed setting (3200 RPM) a couple times a day, but not at its regular speeds (1700 and 2400 RPM) that run throughout the rest of the day/night.

I've reviewed other posts on valve setup for spillover, cleaned all filters, removed/re-installed all check valves and everything seems ok. All pump settings are unchanged from previous years where spillover worked as expected.

Pool equipment pad picture included for reference, with valves set for pool mode on the suction side. Return valve/actuator set halfway between pool and spa - which - historically enabled spillover.

Any suggestions on further troubleshooting that I might be able to do before I call the pool builder's service department?

Thanks!
Scott

 

[HermanTX]

Have you disassembled the return diverter valve (remove the actuator that sites on top of it) to ensure it is in the open mode (to both spa and pool)? From what you show, the spa should be receiving water and thus fill up and flow over to the pool. That should occur regardless of speed since there is no suction from the spa, only water is flowing to it so it should always be at the spillover level. The speed would affect all much flow is going over the spillover.

Another option is to inspect the suction side diverter valve to ensure it is not partially open to the spa thus it is actually removing water from the spa. So at slow speed, it would appear to lower the spa.

It is something between those 2 diverter valves. So inspect both that they are in proper position and also are sealing. It may be time to install new diverters in them.

 

[Jimrahbe]

Scott,

Logically, one of two things is happening..

The flow from your pump, through the filter, and back to the pool is less than it used to be.. Maybe a clogged impeller.. or heater core
or..
The Spa is losing water, due to a leaking Intake valve.

What filter do you have and what is the pressure at 1700 and 3200rpm??

Side note... This often happens when the filter is dirty.. But you say the filter is clean.. If the system worked for a day or so after the filter was cleaned, and then quickly went back to low flow, then that points to algae..

Thanks,

Jim R.