SharkBite male connectors combine innovative push-to-connect design with a standard MNPT adapter on the opposite end. The push-fit end is compatible with copper, PEX, CPVC, PE-RT or SRD9 HDPE pipes and can be installed with no solder, glue, unions or tools required. This fitting is designed for potable water and radiant heating (including underground or behind-the-wall) applications with no access panels required. It is rated up to 200 deg F and 200 psi. The tube shall be inserted into the SharkBite PTC Fitting in the first stage through a release collar and then through a stainless steel grab ring. The grab ring has teeth that open out and grip onto the tube. at the second stage the tube shall be pushed through an o-ring protector which aligns the pipe. A specially formulated EPDM o-ring shall be compressed between the wall of the fitting and the tube before the end of the tube reaches the tube stop. Only when the pipe has passed through the o-ring and reached the pipe stop shall a secure joint be created. The fitting shall be a SharkBitePTC Fitting.