A backflow preventer protects drinking water by way of stopping infected irrigation water from reversing into the delivery

https://cesarotbm223.rivetgarden.com/posts/repairing-low-stress-and-uneven-coverage-in-sprinkler-equipments

A backflow preventer protects drinking water through preventing infected irrigation water from reversing into the source. Annual trying out assists in keeping it functioning and compliant with nearby codes.