Moeller 2-Stage CARB Fuel Cap for Portable Fuel Tank;

Moeller EPA 2-Stage Fuel Cap Moeller's New EPA 2-Stage fuel cap is required on all portable fuel tanks, effective 1/1/2011 Audible "Click" signals cap is sealed on the neck fill Tether secures cap to fuel tank while refueling Auto "Self-Venting" pressure feature vents tank at 5 PSI (Min) when center pop-up vent is in open position. Manual momentary pressure relief valve relieves tank pressure prior to cap removal for refueling or connecting/disconnecting fuel line assembly. Positive vent closure for storage and transportation, designed to override of the automatic "self venting" and manual momentary pressure relief function.