Cot Rehau Rautitan Ø32-45° Rehau Rautitan Ø32-45° is a plastic piping system designed for use in plumbing and heating applications. It is made of high-density polyethylene (HDPE) and is designed to provide an easy to install, durable solution for a wide variety of water and heating applications. The system is available in a variety of sizes and configurations, including elbows, tees, valves, and fittings that can be used to create a complete system. The system is suitable for use in both cold and hot water systems, as well as in heating systems. Additionally, the system is designed to be resistant to corrosion, chemicals, and UV radiation.