Pool Question
Not sure where to put this message so trying here. Can anyone help me identify what each of the valves in the attached photo of our pool installation are for and what they do? It is a salt water pool. I think I have figured the first 3 labeleld B ( Backwash? filters the bottomn of the pool open with the other 2 labelled F (drain at bottom of pool I think and S - skimmer I think switched off). I think the far right marked D is straight into the drain but I cant figure out what the I and C are and what they do. Many thanks