The Attwood Stainless Steel Scupper Valve Barbed with a 1-1/2" hose size offers durable, corrosion-resistant drainage built for boats that demand long-lasting, dependable performance. Crafted from enhanced 316 stainless steel with a mirror finish and passivation, it’s designed to withstand demanding marine conditions above the waterline.
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Material and finish: Cast from Enhanced 316 stainless steel for strength and lifetime corrosion resistance; all visible surfaces are polished to a mirror finish and passivated for added protection.
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Above-waterline design: Specifically engineered for installations above the waterline to endure continual hose flexing and marine exposure.
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Fast, seal-friendly installation: Silicone gasket and a channel under the flange hold a bead of sealant for a quick, trouble-free seal; wrench flats or end notch provide a gripping surface for inside-hull tightening.
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Barbed tail for secure fit: Barbed tail ends accommodate multiple hose clamps, even in tight spaces.
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Backwash-resistant scupper flap: Tough neoprene flap with a molded V fits into the grooved body to reduce backwash and maintain efficient drainage.
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Concealed, corrosion-proof fasteners: Clean, durable hardware designed to withstand marine life and sea spray.
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Manufacturer and specifications: Attwood Marine, part number 66553-3; UPC 022697665539; Hose size 1-1/2" ID; Flange O.D. 3"; Thread Diameter 1-7/8"; Thread Length 3-1/2"; Barb Length 1-1/2"; Total Length 5-1/2"; Install Hole Saw Size 2"; Thread NPSM 1-1/2"; Max Hull Thickness 3".
Built to endure saltwater and freshwater environments, this scupper valve delivers reliable drainage with long service life. Its corrosion-resistant stainless construction, secure sealing features, and backwash-reducing flap reduce maintenance and installation hassle for both new builds and retrofit projects, making it a trusted choice for boaters who value durable, straightforward performance.
