Hi guys. I have read and looked at the pool equipment section of Pool School and had some supplemental questions.
Below is a picture of my pool equipment. I CAN identify the pump, filter, and heater, but not the lines valves exactly. Away on the other side of the pool is the backwash / drain thing that sticks out of the ground. I used this when we had RO treatment on the water.
Can you tell me what these valves or ports are at A, B, and C, and should I be using them for something?