The SEALFAST 1 1/2" F NPT X 2 1/2" M NST Coupling is engineered for efficient fluid transfer in various applications. Featuring a female National Pipe Thread (NPT) on one end and a male NST on the other, this coupling ensures a secure and leak-proof connection. Constructed from durable materials, it is designed to withstand the rigors of industrial use. The dimensions are optimized for compatibility with standard piping systems, making it ideal for fire protection and irrigation applications. This coupling adheres to industry standards, providing a reliable solution for your fluid handling needs.