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Attwood Marine 66553-3 Stainless Steel Scupper Valve

Manufacturer

Attwood Marine

<h3>About Attwood Marine</h3><p><strong>Attwood Marine</strong> has been a cornerstone of the boating world for well over a century. <a href="/7239-attwood-marine">Founded in 1893</a>, the company began by manufacturing precision underwater hardware and on-deck fittings — rudders, struts, cleats, and lights — and quickly earned a reputation for fine engineering and enduring quality. After World War I, the brand's craftsmanship was so well regarded that legendary boatbuilder Chris-Craft turned to Attwood for brass fittings on their iconic pleasure boats.</p><p>Today, Attwood operates as part of the Navico Group by Brunswick, a global family of industry-leading marine companies, yet it has never lost the boater-first focus that built its name. What distinguishes Attwood from many competitors is their end-to-end philosophy: they design, manufacture, test, and distribute their own products rather than simply sourcing components from third parties. Every item in the Attwood catalog is rigorously tested to meet or exceed U.S. Coast Guard (USCG), American Boat and Yacht Council (ABYC), and CE standards — giving boaters and OEM manufacturers alike the confidence to rely on Attwood gear season after season.</p><h3>A Complete Marine Accessories Ecosystem</h3><p>Attwood's catalog spans an impressively broad range of marine needs. On the comfort and ergonomics side, their <a href="/7239-attwood-marine-seat-pedestal-packages-200926">Seat &amp; Pedestal Packages</a> deliver complete, ready-to-install seating system solutions backed by decades of engineering refinement. For boaters who prefer to build or customize their setup, Attwood's Fixed Mount Pedestals provide a sturdy, reliable foundation engineered for lasting stability on the water.</p><p>When it comes to protecting your hull at the dock, Attwood's <a href="/7239-attwood-marine-fenders-200396">Fenders</a> offer dependable, marine-grade cushioning against docks, pilings, and other vessels — an often-overlooked but essential piece of gear for every boat owner. Getting on and off the boat safely is equally important, and Attwood's <a href="/200179-boarding-ladders-attwood-marine-7239">Boarding Ladders</a> are designed with heavy-duty construction, rated hardware, and user-friendly features to make every entry and exit as secure as possible.</p><p>Beyond these categories, Attwood is also widely recognized for its bilge and aerator pumps, navigation lighting, fuel systems, rod holders, and trailering accessories — making the brand a true one-stop resource for outfitting or refreshing virtually any powerboat, fishing boat, or recreational vessel.</p><h3>Why Boaters Choose Attwood</h3><ul style="list-style:disc"><li><strong>100+ Years of Proven Experience</strong> — A heritage of quality engineering stretching back to 1893.</li><li><strong>Multi-Standard Compliance</strong> — Products tested to USCG, ABYC, and CE standards for safety and performance.</li><li><strong>OEM-Trusted</strong> — A leading supplier to major boat manufacturers across a wide range of product categories.</li><li><strong>Corrosion-Resistant Materials</strong> — Extensive use of 304 and 316 stainless steel, chrome-plated zinc, and marine-grade synthetics built for harsh saltwater environments.</li><li><strong>In-House Engineering</strong> — Advanced prototyping, simulation, and real-world testing ensure reliability before any product reaches the water.</li></ul>

Part Number

66553-3
09/12/2036 5:50 AM
Sale Price

$89.88

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The Attwood Marine 66553-3 Stainless Steel Scupper Valve is engineered for superior durability and corrosion resistance in marine environments. Backed by Attwood's Lifetime Warranty, this premium scupper valve is designed to last the life of your boat, eliminating the need for plastic replacements.

Key Features:

  • Cast from certified enhanced 316 stainless steel for maximum strength and lifetime corrosion resistance
  • Mirror-polished visible surfaces with passivation treatment for additional protection against harsh marine conditions
  • Thick steel sidewalls engineered to withstand continual stress and hose flexing
  • Tough neoprene rubber scupper flap with molded V-groove design that fits securely into the grooved body to reduce backwash
  • Concealed fasteners for a clean, professional appearance
  • Premium construction eliminates the need for plastic fittings that degrade over time

Important: This thru-hull scupper valve is designed for installation above the waterline only. Not suitable for below-waterline applications.

Ideal for cockpit drains, transom drains, and deck scuppers where water needs to exit the vessel while preventing backflow. The combination of corrosion-resistant stainless steel construction and flexible neoprene flap provides reliable one-way drainage in all marine conditions.

Products specifications

Dimensions

1 1/2" Inner Diameter3" Hull Thickness1 7/8" Flange Outer Diameter3" Hose Outer Diameter5 1/2" Length

Type

Thru-Hull Fittings

5 rating

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