Backflow Prevention and Cross Connection Control Program

Purpose: 

The Town of Fredricks Backflow Prevention and Cross-Connection Control Program protects the public water supply from pollutants and contaminants that could, under certain circumstances, be drawn into the public water supply from private properties. State regulations requires that a backflow device be installed on any water system that is connected to the drinking water system and carries the potential for cross-contamination from backflow conditions caused by cross connections.

What is Backflow? 

Backflow refers to the undesirable reversal of water flow or other substances into the drinking water supply, posing a risk of cross-contamination with hazardous compounds.

Backflow Prevention DeviceTypes of Backflow Conditions:

  • Backsiphonage: Occurs due to negative pressure in the water distribution system.
  • Backpressure: Arises when the pressure in a private water system exceeds that in the public water lines.

What is a Cross-Connections: 

These are connections between the public water supply and other systems that could introduce contaminants into the water. Cross-connections have been responsible for contamination of drinking water that, when consumed, caused the spread of sickness or disease.

Why do Cross-Connections Exist?

  • Lack of awareness during plumbing installation.
  • Convenience without considering potential hazards.
  • Reliance on inadequate protection measures.

Who is Required to Comply:

  • Commercial, Industrial, Domestic, Irrigation, and Fire Lines: Mandatory installation and annual testing of backflow prevention assemblies.
  • Residential Properties: Requirements vary based on hazards. Single-family residences are encouraged to test irrigation systems every three years.
  • Auxiliary Water Supply or Dual Water Lines: Installation of backflow prevention assemblies is mandatory at the water service connection of the public water supply.

Backflow and Cross-Connection Requirements


The Colorado Department of Public Health and Environment regulates drinking water quality and standards. The Colorado Primary Drinking Water Regulations (Section 11.39) outline Water Utilities' requirements for backflow prevention and cross-connection control.

In addition to the installation of an assembly, the water customer must have the assembly tested upon installation and annually thereafter by a certified tester. It’s important to remember that testing of existing and replacement backflow assemblies must be reported to the Town of Frederick and Aqua Backflow.

Backflow, and testing of new installation backflow assemblies should be submitted to the Town of Frederick by emailing Brad Hirter

Regulation Authority

Regulated by the Colorado Department of Public Health and Environment under Section 11.39 of the Primary Drinking Water Regulations.

Approved Assemblies

Backflow prevention assemblies must have the USC approval and be deemed appropriate for their designated purpose. Furthermore, they must be installed according to the manufacturer's specified configuration and receive approval from the Town of Fredericks Water System Manager.

Types of Backflow Assemblies

  1. Reduced Pressure Principle Assembly (RP):
  2. Double Check Valve Assembly (DC):
  3. Pressure Vacuum Breaker (PVB):

An RP is required for most commercial, industrial and irrigation domestic water applications.

Installation requirements:

  • Either directly down stream of water meter or after the main water shut off valve located inside the building, but in all cases before any T, Y’s or branch off’s of the water service line.
  • Install a minimum of 12 inches off the floor and 12 inches away from a wall.
  • If the assembly is installed higher than 5 feet off the ground, a permanent platform is required for access and maintenance.
  • Adequate drainage is required, as there is a potential for discharge from the unit.
  • Protect from freezing.

For inquiries or assistance, contact Brad Hirter 720-382-5807

By implementing these improvements, the program becomes more accessible and actionable for property owners and ensures better protection of the public water supply.