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The mission of the City of Flagstaff is to protect and enhance the quality of life for all.
Backflow Prevention & Pretreatment
What is backflow?
What causes backflow?
What is backsiphonage?
What is backpressure?
How can backflow be prevented?
What is a backflow assembly?
How is an assembly approved?
Who is required to have a backflow prevention assembly?
How do I know if I need a backflow prevention assembly?
Is there a general compliance schedule and process?
Who can install a backflow prevention assembly?
Where should a backflow prevention assembly be located?
Who is responsible for testing and maintaining the backflow assembly?
I have multiple testing dates for the backflows at my property. Can I consolidate the dates?
I have an irrigation or fire sprinkler backflow assembly I no longer use. Can I remove it?
Disconnection and Removal Instructions
Backflow Device Removal Request
Archived Pretreatment Code Changes
Part 1: FOG Manual and Scavenger Waste
Part 2: Cross Connection and Local Limits for SIUs
Fats, Oils, & Grease (F.O.G) Program
Dental Amalgam Rule
FOG SwiftComply FAQs
Car Wash Mud Sump
Enforcement Response Plan (PDF)
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