Cot Rehau Rautitan Ø16-90° Rehau Rautitan Ø16-90° is a durable, high-performance, plastic pipe system designed and manufactured by Rehau. It is designed to withstand temperatures up to 95°C and pressures up to 10 bar, making it suitable for a wide range of domestic and commercial heating and plumbing installations. The system is made from polyethylene (PE) and is available in a variety of different diameters. It is easy to install with Rehau's patented push-fit technology, which requires no additional tools or glue. The system is also leak-proof, so it can provide a secure connection for your installations.