NIBCO 3/4" 90-Degree Street Elbow. It is made of FlowGuard Gold CPVC and is ideally suited for hot and cold water pressure distribution systems in residential and commercial applications. The CPVC-CTS 90-Degree elbow features a male spigotxfemale socket connection and is used to change the direction of flow. It is corrosion resistant and Lead-Free. NIBCO plastic fittings are backed by a 5-year limited warranty.