How Much Does Backflow Testing Cost? Annual Testing Price Guide

Backflow prevention is a critical component of public health, ensuring that contaminated water from private property does not reverse flow into the municipal drinking supply. For property owners, this means installing and maintaining a backflow prevention assembly. While the device itself is a one-time investment, the annual testing is a mandatory and recurring expense. 

The question, "How much does backflow testing cost?" is common, and the answer, like most services, depends on several factors, including the type of device, the property's location, and the service provider. Understanding the breakdown of these costs can help you budget for this essential annual service.

Factors Influencing Backflow Testing Costs

The price of an annual backflow test is not a fixed number. It typically falls within a range, with the national average often cited between $75 and $150 per device, but it can go higher for complex systems. Here are the primary factors that influence the final price:

1. Type and Location of the Device

The complexity of the backflow prevention assembly directly impacts the time and expertise required for testing.

• Simple Devices (e.g., Double Check Valve Assemblies - DCVA): These are generally quicker and easier to test, often falling on the lower end of the price range.
• Complex Devices (e.g., Reduced Pressure Zone Assemblies - RPZ): RPZ devices are more intricate and require more time and precision to test, often costing more.
• Accessibility: If the device is difficult to access (e.g., buried in a pit, located in a crawl space, or high up), the labor time increases, which can raise the cost.



2. Number of Devices

Commercial and industrial properties often have multiple backflow preventers for different systems (e.g., fire suppression, irrigation, domestic water). While the per-device cost may decrease slightly with volume, the total cost will be higher.

3. Service Provider and Certification

Backflow testing must be performed by a state-certified and licensed technician. Reputable companies with certified plumbers, like Royal Class Service, may charge a slightly higher rate, but this guarantees the test is performed correctly, the results are accurately reported to the municipality, and your property remains compliant.

Beyond the Test: Potential Additional Costs

While the test itself is the main expense, property owners should be aware of potential additional costs that may arise:

1. Repair or Replacement

If the backflow assembly fails the annual test, it must be repaired or replaced immediately.

• Minor Repairs: Replacing seals, springs, or internal components can cost a few hundred dollars, depending on the part and labor.
• Full Replacement: Replacing an entire backflow assembly can be a significant investment, ranging from $500 to over $2,000, depending on the size and type of the device.



2. Re-testing Fees

If a repair is made, the device must be re-tested to ensure it is functioning correctly. Some companies include a re-test fee in the initial repair quote, while others charge a separate, often reduced, fee for the second test.

3. Municipal Fees and Fines

Some municipalities charge a separate filing fee for processing the test report. More importantly, failure to have the test performed by the deadline can result in significant fines from the local Water Treatment authority, which far outweigh the cost of the annual test.

A Small Annual Investment for Public Safety

Backflow Testing is a non-negotiable service that protects the integrity of your community's drinking water. When considering how much does backflow testing cost, it is essential to view it as an annual insurance policy for public health.

At Royal Class Service, we believe in transparent pricing and reliable service. Our certified technicians provide professional, timely, and compliant backflow testing, ensuring your property meets all local regulations and your water supply is protected. Don't risk fines or worse, water contamination. 

Contact us today to schedule your annual backflow test and receive an upfront, no-surprise quote.