New user here finally taking control of my pool. I am working at understanding how everything is working in my system. I can't figure out why the valve in the picture below is there. It is between the outlet of my filter and the gas heater. Also right before the Swg and return to the pool. As you can see it is now partially closed. To me it seems that would be restricting flow back to the pool. Help please.
101.3 KB Views: 61