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 |
|---|---|---|---|
| Backflow Prevention Device Inc | Official tester listed by both Avondale and Glendale; this profile covers the shared West Valley footprint. | Officially listed on Avondale and Glendale tester rosters for the West Valley cluster. | 2026-04-05 |
| A P Fire Protection LLC | Official Glendale tester list entry | Officially listed on the Glendale tester PDF | 2026-04-05 |
| Dust Devil Plumbing Inc | Official Glendale tester list entry | Officially listed on the Glendale tester PDF | 2026-04-05 |