Backflow Testing, Repair & Compliance Services

Backflow prevention devices protect your water supply from contamination caused by pressure changes in the plumbing system. These devices are required on many residential and commercial systems and must be tested annually to meet local and state regulations. D.M. Kelly Mechanical provides certified backflow testing, accurate reporting, repairs, and replacements to ensure your system remains safe and compliant.

What We Offer

• Backflow Testing & Certification — Annual testing performed by licensed and certified technicians, with proper documentation submitted as required.

• Backflow Device Repair — Repair of failed or malfunctioning backflow preventers to restore compliance without unnecessary replacement.

• Backflow Device Replacement — Full replacement of outdated, damaged, or non‑compliant devices with approved models.

• New Backflow Installation — Installation of backflow prevention devices for new construction, remodels, irrigation systems, and commercial applications.

• Compliance Assistance — Help navigating local requirements, test reports, and notifications to ensure you meet city and water district regulations.

Signs You Need Service

• You received a notice from the city or water purveyor

• Backflow device failed a previous test

• Visible leaking or corrosion at the device

• Recent plumbing or irrigation system changes

• Water discoloration or unusual taste

• No record of annual backflow testing

• Installing a new irrigation or fire suppression system

If any of these apply, timely service is important. We’ll inspect, test, and clearly explain your results while handling the required paperwork.

Common Questions

What is backflow testing? Backflow testing verifies that your backflow prevention device is working properly to stop contaminated water from flowing back into the clean water supply.

How often is backflow testing required? Most municipalities require annual backflow testing, though requirements may vary based on system type and local regulations.

Who needs a backflow prevention device? Homes and businesses with irrigation systems, fire suppression systems, commercial plumbing, or auxiliary water sources typically require one.

What happens if my backflow device fails the test? We’ll explain why it failed and recommend repair or replacement options to bring your system back into compliance.