Nontoxic CPVC (chlorinated polyvinyl chloride) pipe and pipe fittings transport potable water, corrosive liquids, and sewage. CPVC is a strong, rigid thermoplastic material that resists corrosion, chemicals, and rust. Lightweight CPVC is immune to damage from highly chlorinated water and resists most acids, aliphatic solutions, bases, halogens, oxidants, and salts. CPVC pipe and pipe fittings come in a variety of shapes and sizes.