The light grey CPVC socket flange features a female socket connection. The Van Stone flange assembly includes a connector hub and a CPVC flange ring. Please refer to Chemtrol technical data sheets, chemical resistance guides and catalogs for engineering and installation information. CPVC Schedule 80 thermoplastics demonstrate excellent mechanical strength over broad temperature range, outstanding underground performance and superior hydraulics. Chemtrol CPVC fittings are lightweight, easy to install, maintenance-free and will not rust, scale, pit or corrode. Chemtrol® premium line of plastic fittings is backed by a 1-year limited warranty. Because Chemtrol® is a NIBCO brand the flow-control fittings are unsurpassed in quality, performance and longevity.