The NIBCO 4501-3-3 schedule 80 coupling pipe fitting is made of PVC and has female National Pipe Taper (NPT) threaded connections. This coupling fitting connects two pipes going in the same direction with the same diameter to extend a straight run. It has female NPT threads for connecting to male threaded pipes, creating a tighter seal than straight threads. This schedule 80 (thick wall) fitting is made of (Chemtrol) PVC for corrosion resistance, high strength, and less weight than fittings made from metal. It is compatible with schedule 80 PVC pipes and fittings, and is suitable for chemical processing, industrial plating, chilled water distribution, deionized water lines, and chemical drainage and wastewater treatment systems. PVC can be connected to other materials such as steel, copper, or cast iron using transition fittings. This fitting provides superior flow to metal because of its smooth interior finish, which reduces friction and inhibits buildup of materials. This fitting meets American Society for Testing and Materials (ASTM) D1784 Class 12454-B specifications for quality assurance.

Pipe fittings are components used for connecting, terminating, controlling flow, and changing the direction of piping in many different industries. When purchasing pipe fittings, consider the application, as this will affect material type, shape, size, and required durability. Fittings are available threaded or unthreaded, in many shapes, styles, sizes, and schedules (pipe wall thickness).

NIBCO manufactures flow-control products for construction, industrial, fire protection, and irrigation applications. The company, founded in 1904, is headquartered in Elkhart, IN, and meets International Organization for Standardization (ISO) 9001 standards for quality assurance.