It is used to change direction in piping in drain-waste-vent applications.
Also called an sixth bend.
It conforms to ASTM D2661 and NSF-DWV.
Recognized by FHA.
WARNING: This product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.p65Warnings.ca.gov/