| Application: | Flow Control |
|---|---|
| Size: | 3/4" |
| Connection Type: | FNPT x FNPT |
| Material: | Iron |
| Body Pattern: | Straight-Angle |
| Max Pressure (PSI): | 125 |
| Position: | Vertical |
| Temperature Range (F): | 250°F Max |
It appears there could be something stuck in the valve that is causing the water to get hung up.
You can unplug the inlet port - just make sure to open the flow control when draining the system.
No, you cannot connect any of these ports directly to an expansion tank.