The Flow Control is a dual-feature, universal gas can spout. It is designed to prevent the dreaded fuel tank overflow, as well as aid the user in making entry and exit from your fuel tank easy and free of spills. The overflow protection is accomplished by the use of a patent pending "float valve" that automatically closes and seals the gas can when the fuel level in your tank is full. The Flow Control also has a secondary "spout bending" feature designed to make getting the gas can spout in and out of your fuel tank easy and spill free. Finally, the Flow Control accomplishes these tasks with little to no restriction in fuel dump speed. Your tank will be topped off with efficiency. Say goodbye to wrestling heavy gas cans, guessing when your tank is full, dealing with "Old Faithful" style overflows and hazmat clean up of spilled fuel. Be sure to see our Fitment Image above to make sure the Flow Control will work with your fuel jug and gas tank.