316 Stainless Steel Marine Tank Vent – Straight & 90° Elbow Fuel and Water Breather for Yachts, Speedboats & Docks

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316 Stainless Steel Marine Tank Vent – Straight & 90° Elbow Fuel and Water Breather for Yachts, Speedboats & Docks

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Type: Model 1 Straight vent with flange bowl

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$35.00 USD

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316 Stainless Steel Marine Tank Vent — Straight & 90° Elbow Fuel and Water Breather for Boats, Yachts & Docks

A tank that can't breathe is a tank that causes problems — collapsed hoses, fuel delivery failures, and pressure buildup that stresses seals and fittings. For boat owners, marina operators, and yacht builders who need a reliable 316 stainless steel marine tank vent that holds up to saltwater, UV, and constant deck traffic, this fitting delivers a clean, corrosion-resistant solution in four configurations to match your installation layout.

Each set includes one vent fitting with a rubber sealing ring and securing nut. The body is precision investment-cast from marine-grade 316 stainless steel and finished with a mirror polish. Four models are available: Model 1 is a straight vent with a wide flange bowl cap — cap diameter 46mm (1.8"), total height 74mm (2.9"), shank thread diameter 27mm (1.1"), hose tail 16mm (5/8"). Model 2 is a 90° elbow version of the same flange bowl design — height 70mm (2.8"), same cap and shank dimensions. Model 3 is a compact straight vent without a flange bowl — cap diameter 25mm (1.0"), total height 76mm (3.0"), shank thread diameter 28mm (1.1"), hose tail 16mm (5/8"). Model 4 is the 90° elbow version of Model 3 — height 70mm (2.8"), same compact cap and shank dimensions. All models use a 16mm barbed hose tail compatible with standard marine vent hose.

These vents are well suited for fuel tank breather fittings on fiberglass powerboats and speedboats, fresh and saltwater tank venting on yachts and sailboats, and deck vent replacements on marina docks and pontoon boats — anywhere a durable stainless steel boat tank vent needs to seal cleanly and resist corrosion season after season.

⚓ Compatible with 16mm (5/8") marine vent hose. Fits standard deck installations on fiberglass, aluminum, and wood-core hulls. Suitable for fuel (gasoline & diesel) and fresh/saltwater tank venting. Deck hole required: 27mm (Models 1 & 2) or 28mm (Models 3 & 4).

✅ Key Features of These 316 Stainless Steel Marine Tank Vents

🔩Marine-Grade 316 Stainless Steel — Contains molybdenum for superior chloride and saltwater corrosion resistance compared to standard 304 SS — the material of choice for stainless steel boat tank vent fittings in harsh marine environments.
✨Mirror-Polished Finish — Precision investment-cast using silica sol process and hand-polished to a mirror surface, reducing surface oxidation and giving the fitting a clean, finished appearance on any deck.
🔄Four Configurations in One Listing — Choose straight or 90° elbow outlet, and with or without a flange bowl cap, so you can match the vent to your exact deck layout and available under-deck clearance without sourcing multiple fittings.
🛡️Mesh Screen Cap — The cap incorporates a fine stainless mesh that allows pressure equalization while blocking insects, debris, and spray from entering the tank — a critical feature for marine fuel tank breather applications.
🔧Rubber Sealing Ring Included — Each vent ships with a rubber gasket that seats between the flange and deck surface, creating a watertight seal when the securing nut is tightened from below — no additional sealant required for standard installations.
📍16mm Barbed Hose Tail — The 16mm (5/8") barbed outlet connects directly to standard marine vent hose without adapters, making this a straightforward drop-in replacement for worn or corroded deck vent fittings on yachts and speedboats.

📐 Technical Specifications — 316 Stainless Steel Marine Tank Vent

Product Type	Marine Tank Vent / Deck Breather Fitting
Material	316 stainless steel (investment cast, silica sol process)
Surface Finish	Mirror polished
Hose Tail Diameter	16mm (5/8") — all models
Model 1 — Straight, Flange Bowl	Cap Ø: 46mm (1.8") \| Height: 74mm (2.9") \| Shank Ø: 27mm (1.1") \| Hose: 16mm (5/8")
Model 2 — 90° Elbow, Flange Bowl	Cap Ø: 46mm (1.8") \| Height: 70mm (2.8") \| Shank Ø: 27mm (1.1") \| Hose: 16mm (5/8")
Model 3 — Straight, No Flange Bowl	Cap Ø: 25mm (1.0") \| Height: 76mm (3.0") \| Shank Ø: 28mm (1.1") \| Hose: 16mm (5/8")
Model 4 — 90° Elbow, No Flange Bowl	Cap Ø: 25mm (1.0") \| Height: 70mm (2.8") \| Shank Ø: 28mm (1.1") \| Hose: 16mm (5/8")
Sealing	Rubber gasket ring (included)
Securing Hardware	Stainless steel nut (included)
Quantity per Set	1 vent fitting + rubber gasket + securing nut
Compatible Tank Types	Fuel (gasoline, diesel), fresh water, bilge vent
Recommended Applications	Yachts, speedboats, sailboats, pontoon boats, marina docks

⚠️ Measure your existing deck hole and under-deck clearance before selecting a model. The 90° elbow models require less vertical clearance below deck. Contact us if you need help confirming which model fits your installation.

❓ Frequently Asked Questions

How do I choose between the straight and 90° elbow vent?

Choose the straight vent when your hose runs directly downward from the deck fitting and you have vertical clearance below the deck. Choose the 90° elbow vent when space below the deck is limited or when your hose needs to exit horizontally — the elbow routes the hose parallel to the deck surface, saving several inches of vertical depth.

What is the difference between the flange bowl and no-flange bowl versions?

Models 1 and 2 include a wide flange bowl cap (46mm / 1.8" diameter) that sits flush on the deck surface, providing a larger, more finished appearance and a broader sealing footprint. Models 3 and 4 use a compact cylindrical cap (25mm / 1.0" diameter) without a flange bowl, suited for tighter deck spaces or a lower-profile installation.

What hose size does this vent fit?

All four models use a 16mm (5/8") barbed hose tail, compatible with standard 16mm marine fuel and water vent hoses. Confirm your existing hose inner diameter before ordering to ensure a secure, leak-free connection.

Is 316 stainless steel suitable for saltwater use?

Yes. Grade 316 stainless steel contains molybdenum, which significantly improves resistance to chloride corrosion compared to 304 SS. It is the standard material for marine hardware exposed to saltwater spray, splash, and immersion. The mirror-polished finish further reduces surface oxidation over time.

What deck hole size do I need to install this vent?

The threaded shank diameter is 27mm (≈1.1") on Models 1 and 2, and 28mm (≈1.1") on Models 3 and 4. Drill your deck hole to match the shank diameter, insert the fitting from above, place the rubber gasket, and secure with the nut from below. Always verify the exact shank size against your specific model before cutting.

Can this vent be used for both fuel and water tanks?

Yes. 316 stainless steel is chemically compatible with both fresh water and marine fuel (gasoline and diesel). The mesh screen in the cap prevents debris and insects from entering the tank while allowing pressure equalization. Confirm compatibility with any specialty fuels or additives before installation.

Does the vent include a rubber gasket or sealing ring?

Yes. Each vent includes a rubber sealing ring that sits between the flange and the deck surface, providing a watertight seal when the nut is tightened from below. No additional sealant is required for standard installations, though marine-grade sealant can be added for extra protection on high-exposure areas.

🛒 Select your model above, then add to cart — each set includes one vent fitting, rubber gasket, and securing nut.

316 Stainless Steel Marine Tank Vent – Straight & 90° Elbow Fuel and Water Breather for Yachts, Speedboats & Docks

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316 Stainless Steel Marine Tank Vent — Straight & 90° Elbow Fuel and Water Breather for Boats, Yachts & Docks

✅ Key Features of These 316 Stainless Steel Marine Tank Vents

📐 Technical Specifications — 316 Stainless Steel Marine Tank Vent

❓ Frequently Asked Questions

316 Stainless Steel Marine Tank Vent – Straight & 90° Elbow Fuel and Water Breather for Yachts, Speedboats & Docks

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