American Valve RCC100 Pipe x Clay Flexible Pvc Coupling Pipe x Clay, 4 x 4" For connnecting drain, waste, and vent (dwv) pipe Connects clay pipe to cast iron or plastic (sch 40) Made of flexible PVC and resistant to household chemicals Perfect for cut-ins and repairs with stainless steel bands for easy installation Certified by IAPMO (UPC) and CSA to US and Canadian Plumbing code standards