Caleffi North America now offers its 1” male x 1” female union thread isolation ball valve. The 209930 valve is designed to fit conveniently between any Caleffi 1” union valve body and tailpiece, the company notes. It is low-lead complaint and is certified to NSF/ANSI 372 and NSF/ANSI/CAN 61. An optional stem extension is available for projects requiring pipe insulation.