Polypropylene (PP) pipe and fittings connect together to divert, divide, or return the flow of liquids and chemicals in fertilizer, herbicide, insecticide, wastewater, saltwater, and HVAC applications. PP is a lightweight, thermoplastic polymer with a wide variety of applications. PP fittings offer impact strength, surface hardness, and abrasion resistance, plus resist a variety of acids, alkalis, and solvent solutions. Polypropylene pipe and fittings come in a variety of shapes and sizes.