GROCO Bronze Hose Barb Thru-Hull Fitting - 1-1/8"

The GROCO Bronze Hose Barb Thru-Hull Fitting - 1-1/8" is a mission-critical through-hull component designed for anglers, cruisers, and serious boaters who demand reliability below the waterline. Whether you're managing raw water cooling systems, bait wells, or through-hull drainage on saltwater or freshwater vessels, this fitting ensures leak-free performance in the harshest marine environments. Built to last through decades of use, the 1-1/8" hose barb connection accommodates standard marine hoses while the thru-hull design integrates seamlessly into existing hull penetrations.

Manufactured from C83600 bronze—a corrosion-resistant copper alloy specifically engineered for saltwater immersion—this fitting resists galvanic corrosion and oxidation that plague lesser materials in marine service. The NPS (National Pipe Straight) threaded design provides secure mechanical connection to your hull or through-hull assembly, while the integral hose barb grips standard marine hose without requiring hose clamps in many applications. UL Listed to standard 647B, this fitting meets rigorous safety and performance certifications for marine plumbing systems, giving you confidence in its structural integrity and fire-resistance ratings.

This fitting is ideal for retrofit installations, system repairs, or new-build projects on vessels ranging from center consoles to offshore cruisers. Installation requires proper hull drilling and through-hull backing plate assembly—standard practice for any marine penetration—and works with both metal and composite hull materials. Anglers operating live wells, tournament boats with sophisticated cooling systems, and cruisers maintaining engine and sanitation systems all rely on GROCO bronze fittings for dependable, corrosion-proof performance season after season.