Mufa PEHD Rainplus 250 PEHD Rainplus 250 is a type of polyethylene (PE) pipe manufactured by Mufa. It is designed for use in agricultural and industrial drainage systems. It is made from high-density polyethylene (HDPE) and has a smooth inner wall for improved flow. The pipe is corrosion and abrasion resistant, as well as being UV resistant. It is suitable for use in temperatures ranging from -40°F to 140°F and is available in sizes from 4" to 12" in diameter. It is also available with a range of fittings and accessories for easy installation.