spa return

New homeowner with a pool and spillover spa and trying to understand the right procedure to keep water circulating in both the pool and spa. Right now the pool is circulating but the spa is not. I was thinking that both the pool and spa can work at the same time but now it looks like it’s...

I am wondering with a pool/spa combo operating on one pump if the spa jets are used as returns when the pool is in pool mode? I get that in spa mode jets are used to create the therapy bubbles. Does every pool/spa combo have at least one dedicated return line to the spa when in pool mode or can...

I have a newly built pool from a local builder. He can't seem to solve the issue in my spa. I've added a sketch and photo for reference. Water and air enter on the center as shown in the sketch and T off to 3 returns each with a 12" extension past the last return on each side (they are not...