The D Series is a complete line of Solvent Weld DWV SCH 40/STD fittings used in drain, waste and vent applications. Engineered to perform in the harshest environments and designed and manufactured to consistent dimensions, these fittings deliver a securely sealed, water-tight joint connection on every installation. Only virgin compounds are used in our injection molding process to ensure the highest quality and durability. All fittings are thoroughly tested for joint tightness, internal stress and stability, color and uniformity. Our solvent weld DWV fittings conform to all municipal, federal and military requirements and are available in wide range of sizes. PVC backwater valves are designed to be integrated with this series.