Abstract: A system is provided for distributing pesticide into the interior walls of a building includes an injection port in a wall of a building, connected to a manifold to which a large number of flexible tubing members, having discharge openings spaced along the length of the tubing members, are attached. The system may include a wheeled vehicle with separate vessels containing pesticide and inert gas under pressure connected to an injection gun. A flow meter is electrically connected to a data processor which records and prints information with respect to the amount of pesticide distributed into the wall. In a preferred embodiment, a device which emits an audible signal is attached at downstream portions of the tubing members to enable service personnel inside the building to confirm that fluid is indeed passing through each of the tubing members.