Topside fuel tank replacement cap for use in EPA-compliant boats built after 2011.Designed for Moeller tanks conforming to the stricter Environmental Protection Agency (EPA) and California Air Resources Board (CARB) spill-control and fuel permeation regulations set for 2011 and beyond.Key FeaturesDirect factory replacement part for your portable fuel tankSame components used in the original tank contructionEPA and CARB approved 2 stage portable tank fuel capFits both pre- and post-2011 Moeller and Tempo Style portable fuel tanksAudible click signals that cap is sealed on neck fillTether secures cap to fuel tank while refuelingAuto-self venting pressure feature vents tank above 5psi when center pop-up vent is in the open positionManual momentary pressure relief valve relieves pressure prior to cap removalPositive vent closure for storage and transportation