WK32547 New Specification for 4-to 60-in. [100- to 1500-mm] Annular Corrugated Profile Wall Polyethylene (PE) Pipe Containing Recycled PE and Fittings for Gravity Flow Storm Sewer and Subsurface Drainage Applications
WK35051 New Specification for 150 to 1500 mm [6 to 60-inch] Annular Corrugated Profile-Wall Polyethylene (PE) Pipe and Fittings for Sanitary Sewer Applications