Designed for handling a range of corrosive fluids at elevated temperatures up to 280 degrees F, the new +GF+ Fuseal 25/50 PVDF Corrosive Waste Piping System from George Fischer Inc. offers superior flame and smoke retardant capabilities, making it an excellent solution for return air plenums. Pipe and fittings are joined using George Fischer's MA 250SE Electrofusion Joining Machine, which provides a seamless bond and permanent maintenance-free joint. The system is composed of polyvinylidene fluoride (PVDF) resin, meeting ASTM E-84 25/50 flame spread and smoke generation building and fire code requirements. George Fischer, Inc.