GROCO 3" NPT Bronze 45 Degree Pipe to 3" Hose

The GROCO 3" NPT Bronze 45 Degree Pipe to 3" Hose fitting is a heavy-duty marine-grade connector engineered for demanding fluid transfer applications in salt-water and industrial environments. Built from C83600 bronze—a corrosion-resistant alloy selected for offshore and coastal installations—this 45-degree male NPT adapter bridges 3-inch NPT threaded pipe connections to 3-inch hose barbs with standard flow capacity. UL Listed to standard 647B, the fitting meets rigorous safety and performance benchmarks for marine systems where reliability under pressure and exposure is non-negotiable.

The 45-degree angle design reduces installation footprint in tight engine room and deck spaces while maintaining full flow efficiency. C83600 bronze resists dezincification and corrosion from saltwater spray, bilge exposure, and humid marine climates far better than standard brass or iron alternatives. The male NPT thread (3-inch) mates with female NPT ports on pumps, manifolds, and seawater systems, while the hose barb securely captures 3-inch ID hose under full system pressure. Standard flow rating ensures this fitting performs without restriction in high-volume transfer or circulation applications typical of marine cooling, ballast, and waste systems.

This connector is engineered for vessel cooling systems, seawater intakes, fuel transfer, and industrial process piping where corrosion resistance and dependable pressure ratings are essential. It suits retrofit and new-build projects requiring a proven adapter between NPT hard-piping and hose runs. The fitting is not NSF-61 certified and should not be used in potable water systems. For applications demanding verified material certification and traceability, the UL listing and GROCO manufacturing heritage provide documented compliance and performance history trusted across commercial marine and industrial sectors.