EPA/CARB COMPLIANT. Gas station functionality with away-from-the-pump convenience; our patented design prevents overflows with auto shut off, restart, and siphon control so fuel transfer is faster and safer. Patented design completely seals internal gas pressure and vapors when closed, and self vents when opened Allows gas to be pumped in any direction, including upward Attaches easily to both Scepter style and all North American manufactured Jerry Cans Completely drains fuel from the tank with no messy funnels, spills or splashing