MPI Fuel Hose USCG Type A In recent years, regulations regarding boat fuel systems have become more stringent. If you are replacing your recreational crafts fuel fill hose, it is essential to have a fill hose that resists the detrimental and degrading effects of ethanol. Through prolonged use, this compounds properties can break down most hoses, as residual ethanol fuel blends usually remain in the hose after filling the tank. Sierra Shields marine MPI fuel hose USCG Type A resists ethanol deter