Thanks for reading this. I'm still pretty new to pools. I found that my pool has a fill line attached to it. It has this 007M3 https://backflowpartsusa.com/shop/backf ... ?product=7 connector which flows through to a valve that runs into my secondary pump. This pump then runs two things: a waterfall overflow from the spa and a caretaker leaftrapper with ~90% of the water volume going to the leaf trapper. I'm attaching photos of the 007M3 and where it runs into my pump.
I don't believe this is an autofill for the pool so I have a couple of questions as I'd love to have an autofill.
1) Is this an autofill?
2) If not, how does it work? If I open the valves on the 007M3 will it just dump water endlessly into the pool?
3) If not an autofill, what would I need to do to make it one? And more or less how much does it cost?
Right now, I've been just running a hose to the pool that is on a timer but I'd love to not have this responsibility.