The purpose of a backflow prevention device is to keep unsafe drinking water from mixing with the potable water supply. A backflow prevention device is to be installed on:
- all residential irrigation systems;
- fire sprinkler systems;
- commercial facilities where chemicals are used;
- boiler systems; and
- other systems where drinking water could become contaminated.
Backflow Prevention helps the City of Coppell ensure a safe drinking water supply for its residents.