One huge change that came with the new Minnesota State Plumbing Code that went into effect on January 23rd of this year was the requirement for annual backflow preventer testing. Here's the exact code ...

Standard industry practice and, sometimes, legal mandates suggest that a backflow test take place at least once a year. The internal mechanisms of these backflow devices, including springs, seals, and ...

City ordinances require homes with underground sprinkler systems to have a backflow prevention device attached to them. The intent is to keep hazardous chemicals out of the city water supply in the ...