How Often Backflow Devices Must Be Tested

Most backflow prevention assemblies in Colorado are required to be tested at least once per year by a certified backflow prevention assembly tester. The exact requirement depends on your local water authority, the type of device, and the hazard classification of your connection.

The general rule: annual testing

Annual testing is the standard across most Colorado municipalities, including those served by Greeley Water, Fort Collins Utilities, Denver Water, and most other local water authorities. Testing must be performed by a state-certified tester and results submitted to the water authority following each test.

When testing may be required more frequently

Some situations may require more frequent testing:

• Following a repair or replacement of the device
• After a known or suspected backflow incident
• Following a water service interruption that may have caused system disruption
• When required by a specific permit or industrial connection agreement

Irrigation systems

Irrigation backflow preventers are typically tested annually in the spring when systems are brought back online for the season. Some water authorities require testing before the system is activated each year. BlueLine can help you schedule irrigation testing at the right time for your system and area.

Fire system assemblies

Fire sprinkler backflow prevention assemblies typically require annual testing and may have additional inspection requirements as part of broader fire protection system maintenance. Building owners should confirm requirements with both their local water authority and fire authority having jurisdiction.

What happens if you miss a testing deadline

Water authorities typically send reminders when testing is due. If a test is not completed by the required date, the authority may issue a notice and in some cases may threaten service interruption for continued non-compliance. Staying on an annual schedule is the easiest way to avoid compliance issues.

BlueLine can help you establish a regular testing schedule so you are never caught off guard by a compliance notice.