Backflow Prevention Device Inspections, Inc. (BPDI) is the oldest and largest backflow prevention assembly testing and backflow repair service in Arizona. We have a staff of highly trained and certified backflow technicians who annually perform thousands of backflow tests and backflow repairs for our hundreds of industrial, commercial, residential customers, schools and cities. While most advertised "backflow testers" are primarily plumbers, and only do backflow work as a side business, BPDI ONLY specialize in the Backflow Industry. The result is an extremely knowledgeable staff with decades of experience that can not be surpassed. 24 Hr/Day Emergency Serivce Available. NEED A BACKFLOW SECURITY CAGE? With Copper theft ALWAYS a danger, we recommend that all our customers protect their valuable assets which are extremely expensive to replace. BPDI can install a protective cage to cover your assemblies. We can even do customs! BACKFLOW PARTS: WE ALSO SELL ALL MAJOR BACKFLOW DEVICES AND REPAIR PARTS