Coalescing/Carbon Filters minimize odor by capturing 99% of liquid particulates released in the form of gaseous vapor. Vent filter is easy to install, snapping conveniently into the “Quick-Disconnect” fitting. A color-changing Carbon Cartridge (top portion) changes from purple to black, as hydrocarbons are absorbed indicating replacement is necessary. The Coalescing Filter (bottom portion) can be reused several times (three or four carbon filter cycles) before replacing. Filters have been design