GROCO Bronze Hose Barb Thru-Hull Fitting - 3/4"

The GROCO Bronze Hose Barb Thru-Hull Fitting - 3/4" (Model HTH-750) is a marine-grade through-hull connector built for demanding saltwater and freshwater applications where reliability is non-negotiable. Whether you're installing new seawater cooling systems, raw water intakes, or waste discharge lines on cruising sailboats, fishing vessels, or pleasure powerboats, this fitting serves as the critical interface between your hull and onboard systems. Thru-hull fittings are essential infrastructure on any boat with through-hull plumbing, and choosing corrosion-resistant bronze construction means years of service without degradation or failure below the waterline.

Manufactured from C83600 bronze—a copper-tin alloy specifically engineered for marine environments—this fitting resists dezincification and galvanic corrosion that would compromise lesser materials in saltwater. The barbed hose connection design accommodates standard marine hose with a secure mechanical grip; the 3/4" National Pipe Straight (NPS) thread allows installation directly into hull skin or bulkhead fittings using appropriate backing plates and underwater sealants. UL Listed certification (647B standard) confirms compliance with maritime electrical and safety codes, providing documented assurance for insurance and inspection purposes. The compact 3 x 3 x 4 inch footprint and 0.5 lb weight make installation and handling straightforward, even in tight engine compartments or bilge spaces.

This thru-hull fitting suits any vessel operator managing through-hull penetrations—from weekend boaters running simple cooling loops to commercial fishing captains maintaining complex seawater systems. Installation requires proper backing plates, external strainers (for intake lines), and marine sealant rated for below-waterline use; GROCO fittings pair seamlessly with standard marine hose, clamps, and seacocks. When replacing corroded or weeping through-hulls, or upgrading aging plastic fittings, the HTH-750 delivers the durability and corrosion resistance that keeps your systems operational and your hull dry for seasons to come.