To be able to protect the potable water from possible contamination while it flows through the distribution system, and to keep in compliance with State and Federal requirements, every Commercial, Industrial, Multi-family, Irrigation and Fire Only Utility Customers is required to have a backflow prevention assembly on any and all services from the water main. It is the responsibility of the property owner to comply with backflow prevention requirements.

Businesses and multi-family utility customers are required to install a domestic backflow prevention assembly after the water meter and prior any interior plumbing branching. Irrigation backflow assemblies are also required on the irrigation sprinkler systems and fire backflow assemblies are required on fire sprinkler systems.

All backflow assemblies must be tested upon installation and annually thereafter by a certified backflow tester. The tester is responsible for reporting to the City of Brighton Utilities Department. Backflow assembly testing is Due by the end of the month of the testing of the previous year.

Thank you for helping us to ensure that the assemblies are operating properly. 


Containment Vs. Isolation 

Backflow prevention assemblies MUST be installed on the supply line before any branching, to contain any potential hazards in the customer’s system(s) from the City’s distribution lines (containment).

Internal protection (isolation) is HIGHLY RECOMMENDED by Utilities Department and may be required by Building Codes, to protect customers from potentially hazardous cross connections within their own system. 

Omission to Regulations 

Due to the potential threat to public health and safety, violations involving Cross Connection are subject to citation and/or discontinuance of service. Any person violating the City's Cross Connection Control Ordinance (Chapter 13-5-20 of the Municipal Code) is subject to enforcement. Reference Municipal Code.

Backflow Inspection Process

1) New & Existing Businesses are required to complete the “Utility Survey”

2) Utility Survey Evaluation & Notification by Utilities Department. After being notified, you are responsible for the installation of any air gap (method), reduce pressure principle assembly(preferred), double check assembly(with approval), and/or pressure vacuum breaker assembly required.

3) Annual Testing & Repair Requirement. It is the owner’s responsibility to pay for annual testing and/or repairs of the backflow assemblies. Testing must be performed by a Certified Backflow Tester. All test reports should be filed by email to All documentation should be filed and kept available for at least 3 years.

4) City Inspections. Inspections will be performed for possible cross connections and documentation will be reviewed to verify compliance. The frequency of city inspections will be determined according to the degree of hazard presented by the business.

If you need specific information, please call 303.655.2133 or email your questions to We will be glad to assist you.