Polypropylene fusion pipe fittings connect to pipe to transport waste in acid waste drainage applications. Fusion pipe fittings incorporate a clamp-free electrofusion joining system for quick connections without expensive tools. This fusion system uses a no-hub coupling design that helps increase joint strength. Polypropylene (PP) is a thermoplastic polymer that offers impact strength, surface hardness, and resists abrasions, acids, alkalis, and solvent solutions. Fusion pipe fittings come in a variety of shapes and sizes.