Molded drain waste and vent fittings shall be manufactured from a PVC Type1 Grade I compound having a cell classification of 12454 conforming to ASTM D1784. DWV fittings shall meet the requirements of ASTM D2665 for Polyvinyl Chloride (PVC) Plastic DWV Molded Fittings and ASTM D3311 for DWV Fitting Patterns. DWV molded fittings shall be certified by NSF® International to meet the requirements of D2665, conforming to the Uniform Plumbing Code.