The SEALFAST 1 1/2" F NST X 1" M NPT fitting is designed for reliable connections in plumbing and irrigation systems. Featuring a female National Standard Thread (NST) on one end and a male National Pipe Thread (NPT) on the other, this fitting ensures compatibility with standard piping systems. Made from high-quality materials, it offers excellent resistance to corrosion and wear, making it suitable for both indoor and outdoor applications. Ideal for connecting hoses and pipes in fire protection systems and water supply lines, it guarantees a secure and leak-free connection.