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Top 10June 2025

Best Boat Fuel Tank Vent Cap

We made a list of the top 10 Boat Fuel Tank Vent Cap based on verified reviews, popularity and other factors which we summarized for you in this list.

Best Choice

Marine Vent Gas Cap for Boat Fuel Tank, Marine Manual Fuel Tank Cap for Moeller Tempo Gas Tank 621501-10, Black, 1 Pack

Marine Vent Gas Cap for Boat Fuel Tank, Marine Manual Fuel Tank Cap for Moeller Tempo Gas Tank 621501-10, Black, 1 Pack

✓【Wide Compatibility】The boat marine fuel tank gas cap compatible with Moeller Tempo gas tank, also fit for a variety of fuel tank models, including 031103, 031106, 031109, 031112, 031212, 620003, 620049, 630012, 630013, 630014, 620040, 720040, 730014, and 730025. The Part Number is 621501-10.
✓【Manual Venting】The marine fuel tank cap features a twist valve for adjustable ventilation, has a manual venting function, which can prevent fule tank from internal collapse or expansion due to changes in external factors.
✓【Sealing Fuel Tank】The manually vented gas cap creates a tight seal with the fuel tank opening, prevents fuel from leaking out. The marine gas cap also stops air and water from entering the fuel tank，prevents the mixing of water and oil, thereby avoiding interference with the combustion process and corrosion of the fuel system.
✓【High Quality】The marine gas tank cap replacement is made of high quality durable plastic, corrosion-resistant, anti-aging, durable, ensures the durability of the fuel tank cap. In the event of a ship collision, a strong gas cap reduces the likelihood of the fuel tank being punctured and fuel spilling out.
✓【Easy to Use】The vented fuel tank cap is easy to use. To open the gas cap, grasp it and turn it counterclockwise. When closing the gas cap, align it properly with the fuel tank opening, turn it clockwise until locks into place. Routine maintenance only requires regularly clean the gas cap to remove any dirt, fuel residue or algae that may accumulate on it.

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8% Discount

Attwood 911526-1 Replacement Cover For P-Trap Fuel Tank Vent Black

Attwood 911526-1 Replacement Cover For P-Trap Fuel Tank Vent Black

✓Replacement cover for standard mount P-trap fuel tank vent.
✓These vents help prevent water from entering the fuel tank, yet allow air to vent freely, during normal sea conditions and washdowns.
✓P-trap vents eliminate the need for an anti-siphon loop in the vent hose.
✓Splash-resistant, corrosion resistant
✓Vents air from your boat's fuel tank as you fill the fuel tank.

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Attwood 66419-3 Composite 90 Degree P-Trap Fuel Tank Vent, Black

Attwood 66419-3 Composite 90 Degree P-Trap Fuel Tank Vent, Black

✓For 5/8" I.D. hose. Meets ABYC standard.
✓These vents help prevent water from entering the fuel tank, yet allow air to vent freely, during normal sea conditions and washdowns.
✓This eliminates the need for an anti-siphon loop in the vent hose.
✓Splash-resistant, corrosion resistant
✓Vents air from your boat's fuel tank as you fill the fuel tank.

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14% Discount

Perko 1319DPGWHT Polymer Vented Straight Neck Gas Fill for 1.5" Hose - White

Perko 1319DPGWHT Polymer Vented Straight Neck Gas Fill for 1.5" Hose - White

✓Black polymer construction
✓No ground wire required
✓Easy installation
✓Built with quality materials

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Attwood 1607-3 Polypropylene Fuel Vent, Black

Attwood 1607-3 Polypropylene Fuel Vent, Black

✓Polypropylene fuel vent for your boat
✓Splash-resistant, corrosion resistant
✓Vents air from your boat's fuel tank as you fill the fuel tank, while allowing fresh air into the tak during engine operation
✓Easy to install on to the fuel tank vent line. Hose clamp required.

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30% Discount

Seachoice Thru Hull Fuel Tank Vent, Chrome-Plated Brass, 5/8 In.

Seachoice Thru Hull Fuel Tank Vent, Chrome-Plated Brass, 5/8 In.

✓Allows for thru-hull fuel tank venting via a hose (not included) from the tank
✓Durable, polished chrome-plated cast brass construction for corrosion resistance
✓Two vent holes
✓Fits 9/16-inch or 5/8-inch hose
✓Manufacturer part number 50-23031

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Manual Vent Gas Cap Compatible with Old Style Portable Boat Gas Tank, 621501-10 Gas Tank Cap Replacement Tempo Gas Tank Parts, Black

Manual Vent Gas Cap Compatible with Old Style Portable Boat Gas Tank, 621501-10 Gas Tank Cap Replacement Tempo Gas Tank Parts, Black

✓【621501-10 Manual Vent Gas Cap】 The marine gas tank cap is specifically designed to be compatible with old style portable M'oeller and T'empo fuel tanks.
✓【Manually Vented】Our vented gas cap for boat fuel tank features a twist valve for adjustable ventilation. Fits tight with no leaks and the vent screw is easy to turn for release and close.
✓【Wide Compatibility】The marine fuel tank cap is compatible with a wide range of fuel tank models, including 031103, 031106, 031109, 031112, 031212, 620003, 620049, 630012, 630013, 630014, 620040, 720040, 730014, and 730025 portable boat gas tank.
✓【Compatibility】Boat gas tank cap fits A'ttwood 12 gallon, 6 gallon and 3 gallon tanks, B'ass Tracker boat tank, S'cepter 12 gal and 6 gallon tank, 3 gallon Q'uicksilver plastic gas tank, old 6 gallon plastic Dura-Tank Essence, M'ercury plastic tank, Y’amaha and more.
✓【High Quality Material】The vented gas cap for boat fuel tank is made of high hardness plastic materials, which is well made, sturdy, will not rust, resistant to corrosion and aging, well tested to ensure long service time.
✓【Easy to Use】No tools needed, simply by turning the top of the tank gas cap and allow your tank to vent properly.

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Vent Gas Cap for Boat Fuel Tank Marine Manual Fuel Tank Caps Replacement Moeller Tempo Fuel Tank (621501-10)

Vent Gas Cap for Boat Fuel Tank Marine Manual Fuel Tank Caps Replacement Moeller Tempo Fuel Tank (621501-10)

✓【Replacement Part Number】621501-10
✓【Compatibility】The boat gas tank cap is suitable for a variety of fuel tank models, including 031103, 031106, 031109, 031112, 031212, 620003, 620049, 630012, 630013, 630014, 620040, 720040, 730014, and 730025.
✓【Material】The boat gas cap replacement is made of durable plastic, which not only ensures the durability of the fuel tank cap, but also has good chemical resistance. It can resist the erosion of acids, alkalis and solvents, and can maintain performance even in harsh environments.
✓【Function】This manual vented fuel tank cap can effectively seal portable fuel containers to prevent fuel leakage. At the same time, through the manual venting design, you can vent the tank by simply twisting the top, avoiding the expansion of the fuel tank caused by temperature changes, ensuring the smooth operation of the engine.
✓【Easy to Install】The marine gas cap is designed to be easy to install and can be quickly replaced or installed on existing fuel tanks without complicated tools or techniques, greatly saving installation time.

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6% Discount

JkorkM 621501-10 Manual Vent Gas Cap Compatible with Old Style Portable Boat Gas Tank, Black Gas Tank Cap

JkorkM 621501-10 Manual Vent Gas Cap Compatible with Old Style Portable Boat Gas Tank, Black Gas Tank Cap

✓Replaces OEM Part Number: 621501-10 Gas Tank Cap
✓Compatible: Manual Vent Gas Cap Compatible with 031103丨031106丨031109丨031112丨031212丨620003丨620049丨630012丨630013丨630014丨620040丨720040丨730014丨730025 Portable Boat Gas Tank
✓Reliable Construction: Manual Vent Gas Cap is made of materials high-hardness, ensuring long-lasting performance even in harsh environments
✓Simple Installation: Our Gas Tank Cap Is Crafted For An Exact Match, Eliminating The Need For Any Adjustments Or Tools. Simply Unscrew The Old Cap And Securely Fasten The New One, Providing A Reliable, Non-locking Seal
✓What You Get: A Premium Product,12-month Friendly Customer Service

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Silipull 2 Pcs Manual Vent Gas for Boat Tank Cap Fuel Vented Gas Cap Replacement, Black

Silipull 2 Pcs Manual Vent Gas for Boat Tank Cap Fuel Vented Gas Cap Replacement, Black

✓Good Compatibility: our 2 pieces manual vent gas tank caps are suitable for old style portable fuel tanks; Made of plastic, they are portable but reliable and sturdy enough for daily use
✓Ease of Use: our vented gas cap replacement is manually vented; Align the vented fuel tank cap with the notch and turn clockwise to completely tighten the fuel tank cap; Push down and twist counter clockwise to remove the fuel tank cap
✓Proper Dimensions: the vented gas cap comes in an approximate size of 2.95 x 2.95 x 1.46 inches/ 7.5 x 7.5 x 3.7 cm, ensuring a proper fit
✓Both Directions Vent: the vented tank cap allows air to enter the tank to prevent a vacuum from forming when the fuel is withdrawn and causing the tank to collapse; When the tank cap is released, it drains the pressure inside the tank to the outside to prevent excessive expansion of the diesel tank
✓Value Pack for Convenience: our package includes 2 vent gas tank caps, meeting your daily needs for use and replacement

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