Sierra Fuel Hose - Bulk

Sierra Bulk Fuel Hose: Marine-Grade Performance Built to Last

When it comes to keeping a boat's fuel system safe and compliant, the hose connecting tank to engine is one of the most critical—and most overlooked—components on board. Sierra has built a well-earned reputation in the marine aftermarket for producing hose that meets the demanding requirements of real-world boating, and their bulk fuel hose lineup is a prime example of that commitment.

The Sierra Shields Series: Low Permeation Done Right

Sierra's flagship bulk fuel hose offering is the Shields Series 368, a low-permeation marine fuel feed hose engineered specifically for the challenges of modern fuel chemistry. The Shields Series 368 features a plastic barrier veneer with an NBR outer layer tube to prevent permeation. That plastic barrier layer is key: it dramatically reduces fuel vapor from passing through the hose wall—a concern that has grown alongside increasingly stringent EPA and CARB emissions standards.

The Shields Series is a reinforced hose that complies with EPA & CARB very low permeation requirements and is weather/UV resistant. For boaters who spend seasons in direct sun and salt air, that UV resistance isn't just a bonus—it's essential to hose longevity.

Broad Fuel Compatibility and Standards Compliance

Modern marine fuel supplies are increasingly blended with ethanol, which can be corrosive to inferior hose materials. Sierra's Shields hose is primarily used for fuel feed with gasoline up to 85% ethanol blended fuels, diesel, and all bio-diesel blends, and meets USCG Type A1-15 requirements for pleasure boats as well as SAE J1527 Type A1-15, ISO 7840 Type A1, and NMMA/CE type accepted standards. That multi-standard compliance means the hose is appropriate for outboard, inboard, and I/O applications across a wide range of vessels.

The temperature range runs from -20°F to 212°F, making it suitable for everything from cold northern launches to high-heat engine compartment environments in tropical climates.

Why Buy Bulk?

Buying fuel hose in bulk quantities—typically in 50-foot cartons—makes sense for marina operators, boatbuilders, repair shops, and serious DIY boaters tackling full system re-rigging. Sierra bulk cartons come in 50 ft. lengths and are available in multiple inside diameters including 1/4", 5/16", 3/8", and 1/2" to accommodate different fuel feed line configurations. Purchasing in bulk reduces per-foot cost and ensures a consistent run of hose without mid-job splices—a meaningful advantage for any professional installation.

Fire-Resistant Fill Hose Options

Beyond the Series 368 feed hose, Sierra also offers fire-resistant fill hose options under the Shields line. The Sierra Shields Fire-Acol 15 low-permeation design features a special NBR tube with an embedded plastic barrier layer to prevent permeation, an NBR/PVC cover that is weather and UV resistant, and is polyester reinforced and fire-resistant. Sierra Shields marine fuel hose also resists ethanol deterioration, while a wire helix woven into the fabric allows the hose to make tight radius bends —a practical benefit when routing lines around engine components or in tight bilge spaces.

A Trusted Name for Marine Fuel Systems

Sierra's bulk fuel hose products reflect the brand's broader philosophy: build to OEM-equivalent or better standards, cover the widest range of applications, and make compliance straightforward. Whether you're re-rigging a fleet of rental boats or replacing aging fuel lines on a single cruiser, Sierra's bulk fuel hose delivers the certifications, material quality, and size selection that marine professionals depend on. Explore the full Sierra brand catalog for additional marine engine parts, filters, and maintenance components.