The Pumper Scent odor-control device from Masport uses exhaust from the vacuum pump to eliminate odors. The vaporizer chamber is placed directly after the oil separator on the truck. Heat and airflow from the vacuum pump activate the scent that bonds with the air molecules to eliminate foul odors generated while pumping grease traps, septic tanks and portable restrooms. Piping sizes for the vaporizer chamber are available from 1 1/2 to 4 inches to fit all rotary vane vacuum pumps. 800/228-4510; www.masportpump.com.