Residential Backflow Testing & Inspection

Backflow prevention devices protect your home’s potable water supply from contamination caused by changes in water pressure. While many homes rely on built‑in protections, certain residential systems—such as irrigation, private wells, or fire suppression—require a testable backflow prevention device. D.M. Kelly Mechanical provides professional residential backflow testing services to verify proper operation, identify failures, and help homeowners meet local water district or municipal requirements.

What We Offer

• Residential Backflow Testing — Certified testing of residential backflow prevention assemblies to verify proper function and compliance with local regulations.

• Backflow Inspection & Certification — Visual and performance inspections with documented test results for submission to water authorities when required.

• Backflow Repair & Replacement — Repairing failed devices or replacing outdated or non‑compliant assemblies to restore protection and pass testing.

• Irrigation System Backflow Testing — Testing of pressure vacuum breakers (PVB), double check valve assemblies (DCVA), and other irrigation‑related backflow devices.

• Compliance Guidance — Helping homeowners understand testing frequency, reporting requirements, and whether their system requires a backflow device at all.

Signs You Need Service

• You received a backflow testing notice from your water provider

• You have an irrigation or sprinkler system

• A previous backflow test failed

• Water authority requires annual or periodic testing

• Your home has a private well or auxiliary water source

• You recently replaced or modified plumbing or irrigation systems

• You’re unsure whether your home has a testable backflow device

Not all homes require backflow testing, but when it is required, missing or failing tests can lead to fines or service interruptions. Our team can quickly confirm requirements and take care of testing or repairs.

Common Questions

Do all homes need backflow testing? No. Most homes rely on built‑in plumbing protections. Backflow testing is typically required for homes with irrigation systems, fire sprinklers, wells, or auxiliary water sources.

How often does residential backflow testing need to be done? Testing frequency is set by your local water authority. Many require annual testing for applicable systems.

What happens if a backflow device fails the test? If a device fails, it must be repaired or replaced and then retested to confirm proper operation.

Can you submit test results to the water district? Yes. We provide documented results and assist with submission when required.

How long does residential backflow testing take? Most backflow tests take 20–30 minutes, provided the device is accessible and functioning properly.