Global Water Resources  Qualified Backflow Tester Information

We are compiling a list of qualified backflow testers.   Beginning April 1, 2022, Global Water will only accept backflow test results from qualified backflow testers who have submitted their qualifications.​

  • Backflow testers will be required to provide their qualifications in January of each year.

  • To be eligible, backflow testers must provide:

  • a copy of their current backflow assembly general tester certification;

  • current test gauge calibration information; and

  • a copy of their state contractor’s license; and

  • proof of company liability insurance with at least a $1 million liability limit. 

If you have any questions about the tester registration process, please email, backflow@gwresources.com or call at

520-483-4575.​