1-1/2 National Pipe Straight Hose Cap & ChainThe 1 1 2 National Pipe Straight Hose Cap & Chain is a protective end cap designed to fit NPSH (National Pipe Straight Hose) threads. This cap is commonly used in fire hose, industrial water systems, and irrigation applications to prevent contaminants, dust, and debris from entering the hose connection when not in use. The attached retention chain ensures the cap remains secured to the hose or fitting, preventing loss. Specifications Details TYPE Hose