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Tempe fire-line backflow testing

Tempe explicitly says fire lines should be protected with a double check assembly located outside or inside the fire riser room.

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City: Tempe Utility: City of Tempe Backflow Prevention Program Cadence: At installation and annually on the anniversary date Last verified: 2026-06-29
Local answer

What to check for Tempe

Tempe explicitly says fire lines should be protected with a double check assembly located outside or inside the fire riser room.

  • Due basis: Tempe uses annual anniversary-date testing by a City-registered certified tester, sends reminders before the due date, and can escalate unresolved noncompliance to termination of water service.
  • Who is affected: Tempe customers with contained cross-connection hazards, including irrigation, fire-line, multifamily, commercial, and other assemblies tracked by the Water Utilities Division.
  • Program phone: 480-350-2678
Local signals

Signals that matter before you act

  • Fire lines are called out directly on the program page.
  • Tempe treats fire-line protection separately from ordinary PVB irrigation use.
  • Registered tester routing still applies.
Workflow

Tempe workflow order

  1. Confirm the fire line assembly type Tempe expects.
  2. Use a Tempe-registered tester who can handle fire-line assemblies.
  3. Keep the annual fire-line record current so enforcement does not escalate.