Attwood Portable Fuel Tanks are constructed of the same high strength Multi-layer Co-extruded HDPE/EVOH material as found in automotive fuel systems. Attood portable fuel tanks are certified to EPA and CARB standards and include an exclusive ratcheting, automatic low-restriction, high-flow fuel cap that ensures proper fuel flow and engine performance in all conditions. Attwood's exclusive high-flow fuel cap exceeds OEM requirements and reduces wear on fuel pumps improving engine performance and life. Attwood Portable Fuel Tanks are designed for use in all Marine and non-marine small engine applications and will provide years of leak-free performance.Automatic vacuum valve ensures proper fuel flow and eliminates the need for manual vent
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