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  1. The mission of the City of Flagstaff is to protect and enhance the quality of life for all.
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  4. Water Services
  5. Wastewater
  6. Backflow Prevention & Pretreatment
  7. FAQs

FAQs

FAQs

  1. What is backflow?
  2. What causes backflow?
  3. What is backsiphonage?
  4. What is backpressure?
  5. How can backflow be prevented?
  6. What is a backflow assembly?
  7. How is an assembly approved?
  8. Who is required to have a backflow prevention assembly?
  1. How do I know if I need a backflow prevention assembly?
  2. Is there a general compliance schedule and process?
  3. Who can install a backflow prevention assembly?
  4. Where should a backflow prevention assembly be located?
  5. Who is responsible for testing and maintaining the backflow assembly?
  6. I have multiple testing dates for the backflows at my property. Can I consolidate the dates?
  7. I have an irrigation or fire sprinkler backflow assembly I no longer use. Can I remove it?
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  1. Backflow Prevention
    1. Installation Instructions
    2. Disconnection and Removal Instructions
    3. Backflow Device Removal Request
    4. Additional Resources
  2. Pretreatment Program
    1. Proposed Pretreatment Code Changes
      1. Part 1: FOG Manual and Scavenger Waste
      2. Part 2: Cross Connection and Local Limits for SIUs
    2. Pretreatment Warning Letter (PDF)
    3. Fats, Oils, & Grease (F.O.G) Program
    4. Dental Amalgam Rule
    5. FOG SwiftComply FAQs
    6. Car Wash Mud Sump
  3. Enforcement Response Plan (PDF)
  4. Contacts
  5. Forms
  6. FAQs
  7. Link to Water Services Main Page
  1. City of Flagstaff Arizona
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  1. Flagstaff City Hall
  1. 211 W Aspen Avenue
  1. Flagstaff, AZ 86001
  1. Phone: 928-213-2000
  1. Email Us

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