GROCO 1/2" Bronze Combo Scoop Thru-Hull w/Nut

The GROCO 1/2" Bronze Combo Scoop Thru-Hull with Nut is purpose-built for anglers and boaters who demand reliable raw water intake on vessels ranging from center consoles to cruising sailboats. Unlike standard thru-hulls that compromise flow for simplicity, this bronze casting delivers the increased volumetric capacity needed for efficient engine cooling, live bait systems, and washdown applications. Whether you're running a high-performance fishing platform or maintaining consistent water circulation on a long-range cruiser, this fitting solves the common problem of inadequate flow at critical operating depths.

Manufactured from C83600 bronze—the marine industry standard for corrosion resistance in saltwater and brackish environments—this scoop thru-hull features a dual NPSM/NPT combination thread design that accommodates both tapered and straight pipe connections. The scoop configuration actively directs water flow into the hull, reducing turbulence and sediment ingestion compared to straight intakes. Bronze's natural resistance to galvanic corrosion means this fitting maintains structural integrity season after season, even when paired with dissimilar metals common in modern hull construction. The included nut ensures secure, leak-free installation from the outside, with a compact 3 x 3 x 5-inch profile that fits tight locker spaces and transom installations.

Experienced boaters upgrading aging raw-water systems, builders installing new cooling loops, and commercial operators needing dependable intake fittings will appreciate the GROCO's time-tested design. The 1/2-inch thread size pairs seamlessly with standard marine hose barbs, strainers, and valve assemblies, making replacement straightforward whether you're replacing a corroded original or retrofitting a modernized cooling circuit. Installation requires basic through-hull methodology—drilling, backing block installation, and careful sealant application—making it accessible to DIY-capable boat owners while remaining a contractor favorite for new construction and major refits.