Overview ROUND HEAD TYPE VIRGIN PVC MATERIAL 4 INCH NOMINAL SIZE SDR 35 SCHEDULE NSF, CSA B182.2, IAPMO, UPC APPLICABLE STANDARD PLUMBING, MUNICIPAL OFFICIAL, BUILDING DRAINAGE, SEWER, SANITARY APPLICATION INJECTION MOLDED PROCESS ASTM D3034/F1336 MATERIAL SPECIFICATION HUB END CONNECTION P MODEL