Uponor ProPEX to MIP Lead-free (LF) Brass Ball Valve provides a reliable, quarter-turn shutoff transitioning from 1/2 in. PEX-a pipe to 1/2 in. MIP. The quarter-turn valves are manufactured from high-quality, lead-free brass to meet safe drinking water requirements. A ProPEX expansion tool and ProPEX rings are required to make the ProPEX connection.