Attwood Stainless Steel Scupper Valve Barbed - 1-1/2" Hose Size

The Attwood Stainless Steel Scupper Valve Barbed—1-1/2" Hose Size (MPN 66553-3) is a marine-grade drainage fitting engineered to move water efficiently from deck and cabin areas back overboard. Crafted from certified Enhanced 316 stainless steel, this scupper valve combines corrosion resistance with structural integrity, making it essential for long-term saltwater service where standard plastic or mild-steel components fail under UV and salt exposure.

The 1-1/2" barbed hose connection accommodates standard marine bilge and scupper hose sizing, ensuring a secure fit without additional fittings. Enhanced 316 stainless steel provides superior corrosion resistance compared to standard 304 stainless, critical in salt environments where chlorides accelerate degradation. All visible surfaces are polished to a mirror finish and passivated, creating a protective oxide layer that extends service life and maintains appearance through years of offshore operation. The valve's design allows gravity-fed drainage while preventing backflow, a straightforward but critical function for keeping water out of living and engine spaces.

This fitting suits weekend fishermen running coastal routes and serious offshore anglers whose boats encounter sustained salt spray and rough conditions. Retrofit installations benefit from the standard barbed connection, which works with most marine-grade hose stocks. Replace aging plastic scuppers—which degrade under UV and become brittle—with a stainless option that handles the boat's lifespan without weakening or discoloring.

Scupper valves are foundational to marine drainage systems and often overlooked until they fail. Attwood's stainless steel construction eliminates the maintenance cycle of plastic replacements and sidesteps the corrosion problems of uncoated fittings, delivering genuine long-term value on any boat operating in saltwater.