BackflowPath Local backflow requirements
Request help
Menu
Request help
Fire-line city route

Flagstaff fire-line backflow testing

Flagstaff also supports fire-side demand because the city publicly addresses annual fire-sprinkler testing waivers and assembly removal approval.

Open fire-line workflow Utility requirements Request local help
City: Flagstaff Utility: City of Flagstaff Backflow Prevention Program Cadence: Annually Last verified: 2026-06-29
Local answer

What to check for Flagstaff

Flagstaff also supports fire-side demand because the city publicly addresses annual fire-sprinkler testing waivers and assembly removal approval.

  • Due basis: Flagstaff requires annual testing for assemblies in the city program, sends courtesy notices when testing is due, and routes tester result submission through BSI Online or city compliance staff.
  • Who is affected: Flagstaff businesses and protected services with contamination risk, plus irrigation and fire sprinkler assemblies that fall inside the city cross-connection program.
  • Program phone: 928-213-2475
Local signals

Signals that matter before you act

  • Residential fire sprinkler waiver logic is public.
  • Removal or disconnection requires prior city approval.
  • The city treats repair and maintenance as compliance events, not informal plumbing work.
Workflow

Flagstaff workflow order

  1. Confirm whether the service qualifies for a waiver or standard annual testing.
  2. Get city approval before removing or disconnecting the device.
  3. Retest immediately after any repair work.