We just remodeled our in ground pool - 28,000 gallon pool with 18" raised spa with 32" spill wall into the pool. Spa has 6 jets (upgraded from 4).
- Pentair Intelliflow VS pump
- Pentair Clean & Clear Plus 320 filter
- Pentair Mastertemp 250 heater
- Solar heating just added
Problem: Raised spa doesn't spill over into pool unless I divert most (nearly all) of the return water to the spa and turn up the pump to almost maximum speed.
When we remodeled, the spa was raised about 18 inches off the ground and we added 2 spa jets. Also, we completely re-plumbed, so there are many more 90-degree angles in the plumbing. Also, they added 2 pool return ports.
When I sum it all up, there just seems to be not enough pressure getting to the spa to force the water to spill over.
I've wracked my brain and it seem that there are a few ways to solve this, but want help from experts:
1) Add flow restrictors to the pool returns (because the return water is taking the least-resistance path).
2) Redirect more return water to the spa (but I don't want to starve out the pool sweep which depends on pool return water. So I cannot go too far)
3) Add speed to the pump. But of course, the whole reason for variable speed is to save electricity, so I want this to work on low RPM settings (I'm hoping it will work at 2200 RPM or or less). Is that a pipe dream?
4) Get a bigger filter (420 instead of 320). My thinking is that with more surface area, the filters won't get dirty as quickly, so the pressure won't build up and rob the system of flow.
I haven't even started up the solar for summer yet, so I wanted to get this all working well before complicating it with the solar.