GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 1-1/2"

The GROCO Stainless Steel Hose Barb Thru-Hull Fitting in 1-1/2" is a marine plumbing essential for any serious boater or angler who demands reliability below the waterline. After years on the water, you know that thru-hull fittings are the backbone of any boat's through-deck connections—whether you're running seawater cooling systems, livewell pumps, or bilge discharge lines. This fitting bridges your hose to the hull with zero compromise on corrosion resistance, making it the go-to choice for salt and fresh water applications alike.

Built from #316 stainless steel, this thru-hull fitting withstands the harshest marine environments without degradation—#316 offers superior corrosion protection compared to standard #304 stainless, particularly in saltwater where pitting and crevice corrosion are constant threats. The 1-1/2" hose barb design accommodates standard marine hose sizes and provides a secure, non-slip connection that won't creep or fail under vibration or thermal cycling. NPS (National Pipe Straight) threading ensures compatibility with standard marine through-deck installations, and UL List 647B certification confirms it meets established safety and performance standards for marine sanitation and water systems.

This fitting is ideal for anglers and boaters upgrading or replacing aging through-deck connections on livewell systems, raw water intakes, or engine cooling loops where durability and leak prevention are non-negotiable. Installation is straightforward—the barb grips hose securely when properly crimped or hose-clamped from the inside, while the thru-hull body seats flush against the hull's interior surface. Whether you're restoring a classic fishing vessel or maintaining a modern center console, the GROCO HTH-1500-S delivers the corrosion resistance and dependability that decades of saltwater service demand.