Used to transition from metal Male pipe threads to CPVC (Chlorinated PolyVinyl Chloride). CPVC coupling required. This special fitting is designed to compensate for the difference in coefficients of expansion which exists between CPVC and metal pipe in hot water applications. Permits easy disassembly of piping system. Manufactured to include no more than 0.25% weighted average lead content on wetted surfaces. Bulk, 20 per box.