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