Attwood Marine Tank Vents/Surge Protector

Attwood Marine Tank Vents & Surge Protectors: Trusted Fuel Safety for Boaters

Attwood Marine has spent over 100 years engineering marine accessories that solve real on-the-water problems. Within the critical category of tank vents and surge protectors, Attwood brings that same century of expertise to one of the most underappreciated — yet genuinely important — aspects of boat ownership: safe, clean refueling and reliable fuel tank ventilation.

Why Tank Vents and Surge Protectors Matter

Every boat with an onboard fuel tank needs a properly functioning vent system. Without it, pressure can build inside the tank, creating dangerous conditions and potentially causing fuel spills at the dock. A surge protector adds a critical extra layer of safety: installed inline along the vent line, it monitors fuel levels as the tank fills and signals when capacity is being reached — helping to prevent costly and environmentally harmful overflow events.

Attwood's Approach to Fuel System Safety

Attwood's lineup in this category reflects their broader engineering philosophy: practical, durable, and standards-compliant. Their Fuel Vent Line Surge Protector (Model 1675-6) is a standout example. Attwood inline surge protectors install along the tank's vent line and warn boaters as the tank approaches maximum capacity, helping automatic shut-off nozzles stop fuel flow before a spill. For situations where a non-automatic nozzle is in use, the surge protector creates a gurgling sound to indicate that the tank has filled.

The surge-ball design uses glass-filled polypropylene construction and withstands oil, gas, and alcohol-blended fuels — an important consideration given the prevalence of ethanol-blended fuels at today's marinas. Its compact size allows installation inside the gunwale in any orientation within 45° of vertical , giving installers flexibility in tight engine compartments and hull cavities.

Attwood also offers the P-Trap Fuel Tank Vent, a more advanced solution. This product eliminates the need to install a fuel line vent and a surge protector separately — one product helps avoid fuel spills, provides fuel tank venting, and resists water intrusion into the fuel system. The P-Trap design is especially popular on boats where space savings and simplified plumbing are a priority.

For boaters seeking a clean, finished look on deck, Attwood's Flush Mount Fuel Tank Vents and Louvered Vent options round out the lineup. The Louvered Vent Venturi features a clean, contemporary louver design and is made from corrosion-resistant, paintable ABS plastic — ideal for matching custom hull colors or keeping a factory-fresh appearance.

Compliance and Construction Quality

All key Attwood surge protectors meet ABYC Standard H-24 , the industry benchmark for marine fuel systems. Attwood has been a proven marine industry leader for over 100 years, and their products are tested to the highest USCG, ABYC, and CE standards. Attwood utilizes high-quality, corrosion-resistant materials such as durable synthetics and polypropylene, ensuring that items like P-trap fuel tank vents and thru-hull connectors can withstand harsh saltwater environments.

Whether you're replacing an aging vent on a center console, upgrading to a combination vent-and-surge-protector unit, or building out a new fuel system from scratch, Attwood Marine's tank vents and surge protectors offer a well-engineered, standards-compliant solution backed by a brand with more than a century of marine credibility.