DC Water Backflow Testing & Compliance

Licensed & Certified for DC Water Backflow Testing 

Backflow testing for DC Water must be performed by a properly trained and certified backflow  prevention professional. Durance Plumbing operates under the following credential: 

• Pipeline Institute Certified Backflow Prevention Technician #23-0210 

This certification qualifies us to test, diagnose, and document backflow prevention assemblies in  accordance with DC Water Cross-Connection Control Program requirements. 

DC Water backflow testing is required when DC Water determines that a plumbing system could allow  contaminated water to flow back into the District of Columbia’s public drinking water supply. Most  property owners begin searching for this service after receiving a DC Water backflow test due notice, a  cross-connection control letter, or a failed backflow test report. 

Why DC Water Requires Backflow Testing 

DC Water enforces backflow testing to protect public health and water quality. Backflow conditions can  occur due to: 

• Water main breaks
• Sudden pressure loss 
• Fire flow or hydrant use 
• Plumbing system changes or additions 

Without a properly functioning backflow preventer, contaminants can be drawn back into the public  water system. To reduce this risk, DC Water requires: 

• Initial testing after installation 
• Periodic testing (typically annual) 
• Testing after repair, relocation, or replacement 

DC Water backflow testing is required when DC Water determines that a plumbing system could allow  contaminated water to flow back into the District of Columbia’s public drinking water supply. Most  property owners begin searching for this service after receiving a DC Water backflow test due notice, a  cross-connection control letter, or a failed backflow test report.