The Timed Drain Maintainer Foam Sanitizing System is a low volume foam applicator for creating a constant, microbial foam barrier between "ready-to-eat" areas and effluent in the drains. This venturi injection system uses city water pressure (50 - 125 PSI) to draw and blend chemical concentrate into the water stream and create an accurately diluted solution using precision metering tips. The adjustable timer runs for up to 1 minute and delays for up to 1 hour. When the system activates, compressed air is injected into the solution to create rich, clinging foam which is projected through a user-supplied discharge hose directly into the drain.