PEX pipe has several advantages over copper pipe for plumbing water supply systems. It is more durable and flexible than copper, with high heat resistance. PEX pipe is cheaper to install than copper since it does not require soldering or special fittings. PEX connections are push-fit rather than soldered, making installations quicker and easier. Due to its flexibility and push-fit connections, PEX pipe reduces the number of fittings needed and the chances of leaks compared to rigid copper pipe.