The Timed Trench Foam Sanitizer is an automated system for creating rich, thick foam sanitizer at regular, timed intervals, and feeding it to a foam bar located in the trench drain that needs to be sanitized. This venturi foamer uses city water pressure (40 - 125 PSI) to draw and blend chemical concentrate into the water stream and creates a wide range of dilution ratios. Rich, clinging foam is created by injecting compressed air into the solution to greatly expand volume and coverage ability. The water, chemical and air flow can be adjusted "on-the-fly" via needle valves. The system timer is user-programmable to meet the needs of any facility. This system can be used for trench drains from 10' to 48' in length - longer trench lengths will require multiple systems.