Official list entries
Authority-first tester table
Use the governing authority list first. Provider profiles and sponsor routing remain secondary to the official approval context.
| Full name | License notes | Company or label | Review date |
|---|---|---|---|
| American Backflow and Fire Prevention, Inc. | Official tester listed by Chandler and Mesa and also present on Scottsdale's utility tester roster. | Officially listed across multiple Phoenix-area utility tester lists. | 2026-04-05 |
| JR Holmes Backflow Prevention | Official Prescott approved tester entry and also present on Scottsdale's utility tester list. | Arizona tester profile grounded in Prescott and Scottsdale utility rosters. | 2026-04-05 |
| Western Backflow Testing LLC | Official tester listed by Phoenix and also present on Scottsdale's quarterly tester roster. | Officially listed on Phoenix and Scottsdale tester lists. | 2026-04-05 |
| Eagle Plumbing Services | Official Scottsdale utility tester entry from the quarterly business-license roster. | Officially listed on Scottsdale's quarterly tester PDF. | 2026-04-05 |
| JAZ Backflow Prevention | Official Scottsdale utility tester entry from the quarterly business-license roster. | Officially listed on Scottsdale's quarterly tester PDF. | 2026-04-05 |