A backflow preventer protects drinking water with the aid of stopping infected irrigation water from reversing into the supply

https://elliotdnfg497.cloudhinter.com/posts/preventative-lawn-sprinkler-maintenance-that-saves-water-and-cash

A backflow preventer protects drinking water by means of stopping contaminated irrigation water from reversing into the supply. Annual trying out maintains it functioning and compliant with regional codes.