Your city water department may mandate that your water sprinkler system and drip irrigation system have specific backflow water preventers on every system connected to the city potable water supply line. Each backflow preventer device protects against the possibility of irrigation water, in the irrigation system, to flow back into the drinking water supply and contaminating clean water.

A backflow preventer mitigates to possible cross contamination of irrigation water into the potable drinking water system. Irrigation water could contain fertilizers, fungicides, herbicides, pesticides, weed killers, pet waste and any other groundwater contamination that could be present. A mandatory backflow test certifies that your backflow preventer is working properly elimination contamination hazards.