A backflow prevention assembly is a mechanical device installed in your private property after the water meter. It prevents water already in your property pipes from “back flowing” into the City water system, possibly contaminating the City’s potable water system. Because the backflow assembly may fail due to foreign matter, it is required by law that they be tested on an annual basis by a certified technician. Horizon Lawn & Landscape is backflow certified for all types of devices including irrigation, fire suppression, and other backflow preventer devices. Please contact us if you require a residential or commercial backflow test performed and get you scheduled!