Attwood Stainless Steel Thru-Hull Short Straight Barbed - 1-1/2" Inner Diameter

The Attwood Stainless Steel Thru-Hull Short Straight Barbed - 1-1/2" Inner Diameter (Model 66545-3) is a marine-grade through-hull fitting designed for anglers, boaters, and vessel owners who demand corrosion-resistant hardware that outlasts the life of their boat. Whether you're running a saltwater center console, freshwater cruiser, or commercial fishing platform, this fitting handles raw-water intake, bilge discharge, and cabin ventilation applications where reliability cannot be compromised. Built by Attwood Marine—a trusted name in marine plumbing systems—this thru-hull offers the durability and longevity that separates a well-maintained vessel from one plagued by recurring maintenance failures.

This fitting features solid 304 stainless steel construction that resists rust and corrosion in saltwater, brackish, and freshwater environments—a critical advantage over plastic alternatives that become brittle and fail prematurely under UV exposure and temperature cycling. The short straight design with barbed inner diameter (1-1/2") creates a secure mechanical connection to hose, reducing the risk of blowouts under load. The barbed profile grips hose firmly without requiring constant hose-clamp re-tightening—a persistent problem on older boats where vibration and thermal expansion work fittings loose. Compact dimensions (3 x 3 x 3 inches) and a weight of just 1.2 lbs make installation and integration straightforward on tight engine compartments and bilge spaces.

Experienced boaters and marine technicians rely on stainless steel thru-hulls for systems where failure means water intrusion, engine shutdown, or even sinking. This fitting is ideal for bilge pumps, raw-water cooling systems, macerator discharge, and cabin ventilation ducts. Before installation, verify that your existing hose inner diameter matches the 1-1/2" specification and confirm the thru-hull location is accessible for future service. Pair this fitting with marine-grade hose clamps and silicone sealant rated for saltwater use to ensure a watertight, long-lasting installation that will perform reliably for decades.