PTFE pipe is a polytetrafluoroethylene, or PTFE, material, which is typically found in the manufacturing of high-pressure plumbing and hoses. It is typically used as a replacement for other materials, such as stainless steel, PVC, and CPVC. It has the same high-pressure and corrosion resistance as these other materials, but it is more flexible and can be used in a wider range of temperatures.