SharkBite EvoPEX System is the first PEX ONLY push-to-connect rough-in plumbing solution designed to use without the need for additional tools and rings. It is engineered to improve efficiency and enable plumbing contractors to optimize install time with clean, leak-free installations unlike traditional crimp and expansion methods. Like traditional SharkBite Fittings, no special tools, soldering, glue or crimping to plumb an entire home, optimizing install time and efficiency. The systems ease of installation reduces the risk of install errors and potential leaks, just push onto PEX Pipe and check the green visual indicator to ensure a proper, leak-free connection. Its that simple. SharkBite EvoPEX Fittings are made from Acudel Plastic it provides toughness and chemical resistance along with excellent anti-decay stability and dimensional stability.