ProLine 1/2" Brass Boiler Drain Valve with PEX Connection. It has a 1/2" PEX connection and a 3/4" hose thread outlet. The cast iron handle provides a comfortable grip, and the pipe threads comply with ANSI B1.20.1 standards. The hose threads comply with ANSI B1.20.7 standards. Meets NSF/ANSI 61-9.