ENV-AS1 Water Inc. Single Outlet Sink Top Air Switch - Satin Nickel (Pictured in Chrome) Air Switches by Enviropure™ are a safe and convenient on/off remote control system that eliminates the need to reach over a countertop with wet hands to operate an electrical switch. They are ideal for garbage disposals, particularly on island installations. The system works on a sealed air displacement principle. As the transmitter button is depressed and released, sealed air is displaced and transmitted through an air hose connected to a pressure sensitive switch, turning the disposal on. The circuit remains energized until the air transmitter is depressed and released again, turning the disposal off.