These CPVC Schedule 80 threaded nipples are made of a special high temperature plastic that won't shrink or melt. They are recommended for all threaded fittings into and out of pool pumps and heaters. CPVC SCH 80 piping offers excellent corrosion and chemical resistance, good physical and mechanical properties, easy reliable joining methods and excellent service life. The maximum temperature for most CPVC piping products is 210ﾂｰF, approximately 60ﾂｺF higher than PVC piping products which widens the application for several chemical service requirements.