







316 Stainless Steel Boat Floor Drain - 90° Thru-Hull Marine Scupper
Tax included (excl. Monaco, Norway, N. Ireland). Check Cart/Checkout for rates. Shipping options (Standard 8-15d / Economy 25-45d) vary by address and weight. Delivery to remote areas is subject to extended transit times. Save ~7% on shipping for orders >100kg (220lbs).
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Professional-Grade Marine Drainage Solutions
Engineered for the uncompromising maritime environment, this 90-degree curved boat floor drain is manufactured from premium 316 marine-grade stainless steel. Unlike standard 304 steel, our 316 alloy provides superior resistance to pitting and crevice corrosion in high-salinity environments.
Technical Precision & Performance
- Fluid Dynamic Geometry: The optimized 90° elbow reduces hydraulic resistance, preventing water accumulation on deck and maintaining vessel stability during high-speed maneuvers.
- Dual Configuration Options: Available in both Integral and Detachable designs to suit your specific plumbing requirements (32mm and 38mm variants).
- Debris Management: Features a precision-slotted grate that filters out contaminants while maximizing discharge velocity.
- Industrial Finish: Each unit undergoes a multi-stage mirror polishing process for a high-reflectivity surface that resists salt crusting.
Ideal for yachts, speedboats, and center consoles, this thru-hull fitting ensures rapid deck evacuation and long-term durability against the elements.
Frequently Asked Questions
- How does 316 stainless steel compare to standard 304 for saltwater use?
- 316 Stainless Steel contains 2-3% Molybdenum, which provides significantly better resistance to chlorides and pitting compared to 304. In marine environments, 316 will maintain its mirror finish while 304 would likely develop surface rust within a single season.
- Can the filter grate be removed if it gets clogged with debris?
- Yes, our 'Detachable' model is specifically engineered for high-debris environments. The precision-slotted cover can be easily removed without specialized tools, allowing for rapid cleaning and clearing of the drainage line.
- Will the 90-degree curve slow down water drainage from the deck?
- On the contrary, the curved elbow is fluid-dynamically optimized to maintain laminar flow. By directing water smoothly into the hose without the turbulence of a sharp bend, it prevents backpressure and ensures faster deck evacuation during heavy spray or washdowns.

Engineering Specs
ESTABLISHED 2017
AirowMarine
Professional Marine Hardware for a Safer Voyage.











