The Easi Plumb Push Fit Elbow 315 1/2" fitting is WRAS approved. It's easy to use: just insert the pipe and push hard, the internal teeth bite down and grip tight, while a specially formulated O-ring compresses to create a perfect seal. This joint can be disassembled just as fast using a disconnecting tool. The fitting instructions are included. This product is suitable for use in both male and female plumbing systems.