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 fl ow and eliminates the need for manual vent
NOTE: All fuel tanks manufactured after January 1st, 2011 for sale in the United States are required to remain sealed up to a minumum of 5psi per new EPA regulations. This assists in preventing fuel evaporation, saving gas and money. This is normal tank operation. Attwood fuel tanks include an automatic vacuum valve to ensure proper fuel flow and engine operation. All Attwood portable fuel compoments are designed to exceed OEM engine fuel flow requirements.