Attwood Low-Permeation Fuel Tanks feature tough, multilayer construction that virtually eliminates fuel evaporation. Injection-molded interfaces deliver years of leak-free performance. Accurate, easy-to-read fuel gauges and Attwoods-exclusive high-flow automatic fuel caps. EPA and CARB certified. Attention: Attaching a Male Tank Fitting to Attwood Tanks. Requires male tank fittings compatible with standard 1/4 NPT threads. The use of an appropriate thread sealant must be used to avoid fuel leakage from any pressurized fuel tank threaded fitting. This can be a properly installed thread tape or thread sealant. Attaching any fittings to the pressurized fuel tank without the use of a properly installed thread sealant will likely result in some fuel seepage thru the connector threads and be visible on and around the tank. The use of a Attwood Universal Sprayless Connector is Highly recommended. The Universal Sprayless Connector replaces traditional fuel tank fittings and is designed to fit any fuel system, and its ease of use makes the refueling process safe and easy. Prevent the wasteful and unsafe loss of fuel from tanks by incorporating the Universal Sprayless Connector with your fuel tank. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Portable Fuel Tanks.