NDS 4 in. Styrene Hub x Hub 90-Degree Elbow is used to make a 90 degree turn in 4 in. sewer and drain (S&D) pipe, in the installation of non-pressurized drainage and sewer piping systems. Styrene construction is durable, lightweight, economical and resistant to corrosion and chemicals. Suitable for use with sewer and drain pipe. Hub x Hub solvent-welded connections. Fits 4 in. sewer and drain pipe. Maximum working pressure of 5 PSI. Made to ASTM specifications.