RSA 485:11 Backflow Device Requirements and Tests, Installations, Repairs and Replacements.

There shall be a backflow prevention device installed at every connection to a public water system if the facility connected may pose a hazard to the quality of water supplied by the public water system as determined by the department. Where applicable, the facility receiving water from a public water supply shall be responsible for having such drinking water distribution system protective backflow prevention devices inspected and tested by individuals certified by a third party who has been approved by the department to conduct backflow device inspection and testing certification. The facility shall also have backflow devices installed, maintained, repaired, and replaced by individuals qualified by either a plumbers license or by certification by the department under RSA 332-E:3, III pro