Webstone, a brand of NIBCO 1/2 in. MIP/SWT x FIP x FIP x Hose Full Port Brass Ball Valve with Hi-Flow Hose Drain-Expansion Tank

The Pro-Pal Expansion Tank Pro Service Valve is a full port forged brass ball valve with a hi-flow hose drain. It is designed to connect directly to the system air separator and expansion tank. The integrated female port provides quick connection to the system's cold water supply.