Valve Thread Copper Pipe Valve Thread Copper Pipe Size(BSP) OD Size Size (BSP) OD Size 3/8″ 12 mm 1¼” 35 mm 1/2″ 25 mm 1½” 42 mm 3/4″ 22 mm 2″ 54 mm 1″ 28 mm 3″ 76 mm
