Radium Quick Fill Dump Can, 6Gal, Standard FillerDump cans are used in motorsports when quick fuel filling pit stops are essential. The main difference between a "dump can" and a common "fuel jug" is the vent architecture. For quick filling, air entering the can must replace the exiting fuel at the same rate. If not, a vacuum will create a flow restriction and produce a "gurgle" or "chug" effect. Fortunately, the large 1. 675" OD vent tube comes from the bottom minimizing refueling leaks. The vent