Backflow Preventer Installation

Purpose

Installation procedures for backflow prevention devices.

When to Use

• New water service requiring backflow preventer
• Replacing failed or non-compliant backflow device
• Annual backflow test failure requiring device replacement

Procedure

Determine required backflow preventer type based on local code and application

Common types: RPZ (reduced pressure zone), DCVA (double check valve assembly), PVB (pressure vacuum breaker)

Install in the correct location per code — typically on the main water service or irrigation line

Ensure proper orientation and flow direction

Install shutoff valves on both sides for testing and service access

Install test ports for annual testing

Verify device is accessible for annual testing per code

Perform initial backflow test after installation (requires certified tester)

Submit test report to local water authority

Document installation in ServiceTitan with photos

Important Notes

• Ohio municipalities have varying requirements — verify local code before installation
• Only certified backflow testers can perform the annual test and submit reports
• RPZ devices require adequate drainage — they discharge water during relief events
• Backflow testing is recurring revenue — schedule annual tests for installed devices
• Permits may be required — coordinate with the office

Related SOPs

• Backflow Prevention Certification — certification requirements
• Permit Application & Requirements — permitting for backflow work
• Ohio Plumbing License Requirements — who can install backflow devices