Cot PEHD Rainplus 40/45° Cot PEHD Rainplus 40/45° is a drainpipe made of high-density polyethylene (HDPE) that is designed to be used in outdoor drainage systems. It is corrosion-resistant and resistant to most chemicals and solvents, making it a great choice for drainage systems that are exposed to a variety of harsh environmental conditions. The pipe is pre-sloped at a 40° or 45° angle, making it easy to install and provide an efficient drainage solution. It is also lightweight and easy to cut, making it ideal for tight spaces.