GROCO 3/4" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut

The GROCO 3/4" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut provides a critical connection point for raw water intake or discharge systems on recreational and commercial vessels. Designed for boaters who demand absolute reliability in corrosive marine environments, this fitting ensures a watertight seal for essential hull-side plumbing. Whether you are outfitting a livewell, engine cooling system, or bilge discharge, this component serves as a durable foundation for safe fluid transfer. Its robust construction is vital for maintaining the structural integrity of the hull while facilitating necessary plumbing transitions below the waterline.

Cast from high-grade C83600 bronze, the GROCO 3/4" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut offers exceptional resistance to dezincification and galvanic corrosion. The unique NPSM and NPT combination thread design allows for versatile installation, accommodating standard pipe threads while providing the necessary clearance for secure hull mounting. This UL Listed 647B component includes a heavy-duty bronze nut to ensure a fixed, vibration-resistant installation that meets stringent marine safety standards. The precision-machined internal surfaces provide a smooth flow path to minimize turbulence and prevent debris buildup in critical water lines.

Professional marine technicians and offshore anglers choose the GROCO 3/4" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut for its proven durability in both saltwater and freshwater environments. The 3/4-inch sizing makes it a standard choice for marine hoses and seacocks commonly found in mid-sized hulls. Proper installation requires the use of marine-grade sealant and a compatible backing block to distribute stress evenly across the hull surface. This fitting is engineered to work seamlessly with other bronze hardware, ensuring a leak-free plumbing system that stands up to years of heavy use on the water.