Essential Guide to Tualatin Backflow Testing and Plumbing Compliance Checks
Plumbing compliance checks are essential for ensuring the safety and functionality of water systems. In Tualatin, backflow testing is a crucial part of these checks, designed to prevent contaminated water from entering the clean water supply. Backflow occurs when water flows in the opposite direction than intended, potentially carrying harmful substances into drinking water. To mitigate this risk, backflow prevention devices are installed and must be tested regularly to ensure they are working correctly.

Understanding Backflow Prevention Devices
Backflow prevention devices come in various types, each suited for different applications. The most common types include:
- Reduced Pressure Zone (RPZ) Valves: These are highly effective for high-hazard situations and are often used in commercial and industrial settings.
- Double Check Valves: Suitable for low-hazard applications, these devices are commonly found in residential properties.
- Pressure Vacuum Breakers: These are typically used in irrigation systems to prevent backflow from outdoor water sources.
Each type of device requires specific testing procedures to ensure it functions as intended. Regular maintenance and testing are mandatory to comply with Tualatin’s plumbing regulations.
The Backflow Testing Process
Backflow testing involves a series of steps to verify that the prevention device is operating correctly. A certified backflow tester will:
- Inspect the device for visible damage or wear.
- Test the check valves to ensure they close properly.
- Measure the pressure differential to confirm the device activates as needed.
- Document the test results and submit them to the local water authority.
Testing must be performed by a certified professional to ensure accuracy and compliance. Property owners are responsible for scheduling these tests annually or as required by local regulations.
Legal Requirements in Tualatin
Tualatin follows strict guidelines to protect its water supply. Property owners must:
- Install approved backflow prevention devices where required.
- Schedule annual testing with a certified professional.
- Submit test results to the local water authority.
- Repair or replace faulty devices promptly.
Failure to comply can result in penalties, including fines and water service disconnection. It is essential to stay informed about local requirements to avoid these consequences.
Comparison of Backflow Prevention Devices
| Device Type | Application | Testing Frequency | Average Cost (USD) |
|---|---|---|---|
| RPZ Valve | High-hazard | Annual | 300-500 |
| Double Check Valve | Low-hazard | Annual | 150-300 |
| Pressure Vacuum Breaker | Irrigation | Annual | 100-250 |
Choosing the right device depends on the specific needs of your property. Consulting with a licensed plumber can help determine the best option for your situation.
Benefits of Regular Backflow Testing
Regular backflow testing offers several advantages:
- Ensures compliance with local regulations.
- Protects public health by preventing water contamination.
- Reduces the risk of costly repairs by identifying issues early.
- Maintains uninterrupted water service.
Investing in regular testing is a small price to pay for the peace of mind and safety it provides.
Finding a Certified Backflow Tester in Tualatin
To ensure your backflow testing is performed correctly, it is crucial to hire a certified professional. Look for plumbers who are:
- Licensed by the state of Oregon.
- Certified by the American Backflow Prevention Association (ABPA) or a similar organization.
- Experienced in testing the specific type of device installed on your property.
Local water authorities often provide lists of certified testers, making it easier to find a qualified professional.
For more information, visit the City of Tualatin or the American Backflow Prevention Association .