Backflow Prevention | Garrett Mechanical

Why Backflow Prevention Matters

Backflow preventers protect potable water systems from contamination. Municipal codes require annual testing and certification. Our certified testers provide comprehensive backflow testing, repair, and documentation - ensuring compliance and protecting public health.

Annual Testing required by law

100% Certified testers

Same-day Report filing

What Is Backflow?

Backflow occurs when water flows backward through plumbing systems - allowing contaminants from fire sprinklers, irrigation systems, boilers, or other non-potable sources to enter the drinking water supply.

Backflow preventers are mechanical devices with internal components that wear over time. Annual testing verifies devices function properly and haven't degraded, protecting public health and ensuring compliance.

Legal Requirements

Annual testing: Required by municipal codes
Certified testers: Only certified pros can test
Documented filing: Reports filed with authorities

Plumbing technician testing backflow preventer

The Testing Process

Our certified technicians follow a systematic testing process for complete compliance:

Device Identification

Locate all backflow devices on property
Verify proper installation location
Document device type and manufacturer
Check accessibility for maintenance
Review previous test records

Visual Inspection

Check for visible leaks or corrosion
Verify proper clearances around device
Inspect test cocks and shutoff valves
Check mounting and support structure
Document device condition

Performance Testing

Use calibrated test gauges
Test check valve operation
Verify relief valve function
Measure differential pressure
Compare to manufacturer specs

Pass/Fail Determination

Compare results to code requirements
Verify all components within spec
Document test measurements
Identify needed repairs
Provide clear recommendations

Repair or Replacement

Replace failed check valves
Repair or replace relief valves
Service test cocks as needed
Complete device replacement if required
Retest after repairs completed

Documentation & Filing

Complete official test report forms
File reports with water authority
Provide customer documentation
Tag device with test date
Schedule next annual test

Device Types We Service

We test and service all backflow preventer types including reduced pressure zone (RPZ) devices, double check valve assemblies (DCVA), pressure vacuum breakers (PVB), and atmospheric vacuum breakers (AVB).

When devices fail testing, we execute repairs on-site using manufacturer-approved parts. Most repairs are completed during the test visit, with immediate retesting and certification.

Schedule Testing

Backflow Service Benefits

Professional backflow testing keeps you compliant and protects water quality.

Certified Testers

ASSE-certified backflow testers with current certifications and calibrated equipment.

Complete Documentation

Test reports filed immediately with water authority - ensuring full compliance.

On-Site Repairs

Most repairs completed during test visit - minimizing service calls and delays.

Compliance Tracking

Annual renewal reminders ensure you never miss required testing deadlines.

Public Health Protection

Properly functioning backflow preventers protect drinking water from contamination.

Avoid Water Shutoff

Non-compliance results in fines or water disconnection - we keep you compliant.

Backflow Prevention Testing & Service