Attwood Marine Portable/Topside Tanks

Attwood Marine Portable & Topside Tanks: Built for the Demands of the Water

When it comes to reliable fuel storage on the water, few names carry the weight of Attwood Marine. A proven marine industry leader for over 100 years, Attwood has built its reputation by engineering products that meet — and often exceed — the strictest safety and regulatory standards in the industry. Their portable and topside fuel tanks are a prime example of that commitment, delivering performance and peace of mind to boaters in a wide range of applications.

Multi-Layer Construction That Sets the Standard

What separates Attwood's portable fuel tanks from the competition starts at the material level. Attwood's tanks are constructed of multi-layer co-extruded HDPE and EVOH — the same high-strength material technology used in automotive fuel systems. This multi-layer approach makes them among the most durable, low-permeation tanks available, virtually eliminating fuel evaporation and meeting the demanding functional and safety requirements of the harsh marine environment.

All Attwood portable fuel tanks are certified to both EPA and California Air Resources Board (CARB) standards, making them legal for use across all 50 states. This compliance isn't an afterthought — it's baked into every design decision, from the sealed construction to the integrated venting system.

Innovative Features Designed for Real-World Use

Attwood's engineers have packed meaningful innovations into these tanks to simplify life on the water:

• Automatic Vacuum Valve: Ensures proper fuel flow and eliminates the need for a manual vent, reducing the chance of user error and improving engine performance in all conditions.
• Exclusive High-Flow Fuel Cap: Attwood's ratcheting, automatic low-restriction, high-flow fuel cap exceeds OEM requirements and reduces wear on fuel pumps, helping extend engine life.
• Ergonomic Design: A tethered, self-sealing cap with an audible click confirms a secure seal every time.
• Gauge-Equipped Options: Several models include a built-in fuel gauge, so you always know your remaining fuel level at a glance.
• 1/4" NPT Fittings Compatibility: Designed for straightforward integration with standard marine fuel systems.

A Range of Sizes to Match Any Outing

Attwood offers portable tanks in multiple sizes — including 3-gallon, 6-gallon, and 12-gallon configurations — with both standard and low-profile form factors available to fit the layout of nearly any vessel. Whether you're powering a small aluminum fishing boat or need a larger reserve for extended runs, there's an Attwood tank sized for the job. These tanks are also designed for use in non-marine small engine applications, adding versatility beyond the dock.

Compliance, Safety, and a 2-Year Warranty

Attwood tanks are tested to the highest USCG, ABYC, and CE standards, consistent with the brand's century-long commitment to safety and quality. Most tanks in this line are backed by a 2-year warranty, reflecting Attwood's confidence in the durability of their products. As part of the Navico Group by Brunswick, Attwood continues to invest in engineering and innovation that keeps boaters safe and engines running efficiently.

Explore the full Portable/Topside Tanks category to find the right capacity and configuration for your boat, or visit the complete Attwood Marine brand page to discover their broader lineup of marine fuel systems, lighting, bilge pumps, and more.