Teu FI PP-R CT 25x3/4"x25 Teu FI PP-R CT 25x3/4"x25 is a type of polypropylene piping used in plumbing and heating systems. It is a cross-linked polypropylene pipe that is rated for temperatures up to 95°C (203°F). It is designed for use in hot and cold water supply systems, as well as for drainage and sewerage systems. It is highly resistant to corrosion and abrasion, and is also resistant to chemicals and UV radiation.