Description SweetVent is an odor control product designed to control vent stack odor emissions. These emissions can be from a range of sources, such as municipal and industrial wastewater facilities, restaurants, and various commercial and industrial operations. SweetVent is a simple device that attaches to the end of a vent stack. SweetVents come in two varieties: slip-on or flanged vent stack connection. Both varieties are available in a range of sizes. All SweetVents contain 10 pounds of Calgon Carbon's Centaur* HSV catalytic activated carbon. Operation The SweetVent utilizes the positive pressure generated inside the vent line to push the contaminated air up through the unit. The odorous compounds are adsorbed by the Centaur* HSV carbon allowing clean air to pass through the end of the SweetVent into the atmosphere. The pressure surges within the vent line are sufficient to overcome the pressure drop across the carbon bed. When odor breakthrough occurs, only the carbon needs to be replaced. Refill bags of Centaur" HSV carbon are available in 100 pound drums containing five 20 pound bags.