316 Stainless Steel Boat Floor Drain - 90° Thru-Hull Marine Scupper

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Sale price€12,95
Size: Integral 32MM
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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.

Vertical infographic listing technical specifications: 316 Stainless Steel, Mirror Polish finish, and 90-degree curve angle.

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

REV: 2025.Q4 // TECH-STANDARD
Material_Grade
AISI 316 Stainless Steel
Surface_Finish
Mirror Polish (800 Grit Equivalent)
UV_Resistance
Electropolished (Full UV Reflectivity)
Corrosion_Rating
316 Stainless Steel Salt-Spray Tested
Compatibility
Yacht, Speedboat, Center Console, Pontoon
Hull_Integration
Fiberglass, Aluminum, Steel
Standard_Ref
Universal Fit Marine Scupper

ESTABLISHED 2017

AirowMarine

Professional Marine Hardware for a Safer Voyage.

Design engineers and marine consultants reviewing technical blueprints and a stainless steel porthole window assembly in an office overlooking a container port.

Our Roots

Hong Kong Based, 8 Years of Expertise

The story of AirowMarine began eight years ago. Headquartered in Hong Kong, we have been dedicated to the global operation and brand building of marine accessories. These eight years of experience have taught us that on the unpredictable sea, every single component carries the trust and safety of the boat owner.

B2B marine hardware production: A massive mirror-polished 316 stainless steel boat anchor being hoisted for quality verification in AirowMarine’s industrial workshop in mainland China.

Supply Chain

Invested Factories in Mainland China

To ensure our products withstand extreme environments, we are more than just a bridge for trade. AirowMarine has invested in its own manufacturing facilities in Mainland China. Leveraging the region's mature and efficient industrial supply chain, we are deeply involved in the entire process—from raw material selection and precision machining to final assembly. We avoid exaggerated claims; instead, through professional logistics and rigorous quality control, we ensure every product delivered to you meets high nautical-grade standards.

Technical quality control inspection showing a Mitutoyo digital caliper measuring a polished marine fitting at 12.45mm precision.

Reliability

Strict QC & Global Logistics

As a provider of marine accessories, our business is intimately connected to the water. We believe that protecting the ocean is not just a slogan; it must be reflected in every detail of our business. Currently, AirowMarine is continuously optimizing our packaging solutions: we maximize the reduction of single-use plastics in our packaging and shipping processes, using recyclable paper-based cushioning materials whenever possible. Our products are built to power your voyage, while our packaging is designed to protect the purity of the blue sea.

Close-up of a 316 stainless steel circular louvered deck vent in eco-friendly honeycomb paper packaging with AirowMarine shipping label.

Our Mission

Protecting the Blue, Plastic-Free

We are aware that there is always room for improvement, but we have never stopped in our pursuit of excellence and environmental responsibility. AirowMarine is committed to providing you with durable, reliable, and eco-conscious marine accessories.

Expert Guidance

Technical help in 24 hours

International Delivery

Secure & Tracked Shipping

Custom Solutions

Tailored parts for your boat

Factory Direct

Invested supply, best value

Proven Quality

Tested for nautical safety