I'm a brand new pool owner, so maybe this is a stupid question (or maybe the setup is stupid)? I've got a pool with a little built in spa that spills over into the pool. My heater (Raypak Gas) has separate temperature settings for both the pool and for the spa, but I don't really understand how it works. I've got a pipe in and a pipe out, so I assume it heats the water and then sends it back out in the single pipe. At that point the pipe splits off into a T joint with a jandy valve and back into either the pool, the spa or both depending on where the valve is...
So how the heck does it heat each separately?
So how the heck does it heat each separately?