I have a desuperheater system that pushes the hot water thru a loop system that heats the floor of a room on a concrete slab. I am still learning how all this system works but I know I have water coming in but then there is no water getting to the system. I am attaching a pic of where I think the issue is, which I am guessing us some kind of valve? No water gets to the small gray bladder tank or anywhere past that T valve. Any help is appreciated.