Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 3/4" Inner Diameter

The Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 3/4" Inner Diameter is the marine industry standard for through-hull fittings that demand reliability in saltwater and freshwater environments. After decades on the water, any experienced boater knows that through-hull penetrations represent critical vulnerability points in a hull's integrity. This fitting serves as the foundation for everything from raw water cooling systems to bilge pump discharge lines, making material selection non-negotiable for long-term vessel performance.

Constructed from marine-grade stainless steel, this thru-hull fitting delivers superior corrosion resistance compared to brass or plastic alternatives that degrade under constant saltwater exposure. The straight barbed design creates a secure mechanical lock when fitted into rubber hose, eliminating the need for additional clamps in many installations and reducing potential failure points. The 3/4" inner diameter matches common marine plumbing specs for mid-sized vessels, and the standard configuration accepts both traditional hose barbs and modern compression fittings depending on your system design. Stainless construction means this fitting will outlast the hose, the boat's topside, and likely your ownership tenure—no green corrosion, no brittleness, no replacement headaches.

Cruising boaters, liveaboards, and commercial operators benefit most from upgrading aging plastic thru-hulls to stainless steel, particularly on through-deck or below-waterline applications where failure creates emergency situations. Installation requires careful sealing from both interior and exterior—proper use of marine sealant and backing plates prevents weeping and maintains watertight integrity. Confirm that your existing hose diameter and sea-cock configuration match this 3/4" specification before ordering; mixing hose sizes creates weak links in your cooling or drainage system.