What to expect
A general overview of how backflow preventer installation and testing typically works. The specific steps can vary depending on your property and water authority requirements.
Initial call and property assessment
The first step is understanding your property's specific situation — whether you've received a notice from your water authority, are installing an irrigation system, or need to address a compliance issue. A brief conversation can clarify whether you need installation, testing, or repair, and what device type may be appropriate.
Determining the required device
The appropriate backflow preventer depends on the degree of hazard present. This is determined by the type of cross-connection possible at your property and your water authority's requirements. Common installations include reduced pressure zone devices for irrigation systems and double check assemblies for certain fire protection applications.
Installation at the service connection
The device is installed on the service line, typically located on the customer's side of the water meter and as close to it as practical. Installation must comply with local requirements for positioning, clearance, and drainage. The exact placement depends on your plumbing configuration and water authority specifications.
Testing after installation
New installations must be tested to verify proper operation. Testing involves checking the device's check valves and, for RPZ assemblies, the relief valve. The test results are documented and typically submitted to the water authority as proof of compliance.
Annual testing and maintenance
Most testable backflow prevention assemblies require annual testing. Your water authority will typically send a notification when testing is due. Regular testing ensures the device continues to function properly and maintains compliance.
Understanding the compliance timeline
If you've received a notice from your water authority requiring backflow prevention, there is typically a window of time to come into compliance. The exact deadline depends on the authority and the urgency of the situation.
For new installations required due to a notice, the installation must be completed and tested within the specified timeframe. Failure to comply can ultimately result in water service disconnection.
Once installed, the device requires annual testing to maintain compliance. Many water authorities send reminders before the due date.
Key timelines
| New installation | Within timeframe specified by water authority |
|---|---|
| Initial test | At time of installation |
| Ongoing testing | Annually, per water authority schedule |
| After repair | Retest required |
Before service
Have your notice available
If you received a letter from your water authority, having it available during the initial call helps clarify the specific requirements.
Know your meter location
The installation occurs near the water meter. Knowing where it's located — basement, crawl space, vault — helps plan the service.
Note any existing device
If a device is already installed, noting its type or any visible issues can help determine whether testing or repair is needed.
Questions about the process
Ready to schedule service?
Call to discuss your property and arrange a visit.