GROCO 3/4" Bronze Combo Scoop Thru-Hull w/Nut

The GROCO 3/4" Bronze Combo Scoop Thru-Hull with Nut is a marine through-hull fitting engineered to deliver superior flow rates compared to standard through-hull assemblies. Cast from C83600 bronze—a naval-grade copper alloy selected for corrosion resistance in saltwater environments—this fitting is designed for seawater intake applications where reliability and durability are non-negotiable. The combo scoop design maximizes water flow while the bronze construction ensures long service life even in harsh marine conditions.

The 3/4" thru-hull features NPSM/NPT combination threading, allowing flexible installation compatibility across different piping systems found on modern and vintage vessels. The internal scoop geometry increases the volumetric flow of raw water into cooling systems, baitwell circulation, or washdown applications—a measurable advantage over standard straight through-hulls. Supplied complete with a nut for secure mounting through the hull, this assembly simplifies installation and eliminates compatibility guesswork. C83600 bronze resists dezincification and saltwater corrosion far more effectively than cheaper alternatives, making it the standard choice for professional fishing vessels, offshore cruisers, and commercial marine operations.

This through-hull is ideal for vessel owners seeking a reliable intake fitting for engine cooling loops, galley water systems, or live-bait tank circulation. Serious anglers and long-distance cruisers depend on GROCO through-hulls because they remain trouble-free across years of continuous exposure to saltwater and UV. The bronze combo scoop design is particularly valued in applications where flow volume directly affects system performance—whether maintaining engine temperature or sustaining live-bait oxygenation during multi-day offshore trips. Weekend boaters and commercial operators alike recognize GROCO's reputation for engineering fittings that outlast the vessels they're installed on.