Locate the toilet drain line and identify the vent connection
Check the existing vent stack for blockage or damage
Run a vent pipe from the toilet drain line upward to the vent stack
Keep the vent pipe as short and straight as possible
Maintain the required pipe slope on any horizontal vent sections
Use the correct pipe diameter for the toilet vent
Connect the vent above the toilet’s flood rim level
Secure all fittings with proper solvent welds or approved connectors
Extend the vent through the roof or tie it into an existing vent system
Install an air admittance valve only if allowed by local code
Test the toilet for proper flushing and drainage
Verify there are no leaks at all connections
Confirm the installation meets local plumbing code requirements