Turn off the gas supply
Relieve any remaining pressure in the line
Verify the gas filter is the correct type and flow direction
Gather the required tools and fittings
Shut off power to nearby appliances if needed
Remove the section of pipe where the filter will be installed
Clean the pipe ends and threads
Apply approved pipe sealant or thread tape to threaded connections
Install the gas filter in the correct flow direction
Tighten all connections securely
Support the filter and piping to prevent stress
Check that the installation is aligned and accessible
Turn the gas supply back on slowly
Test all connections for leaks with an approved leak-detection solution
Tighten any leaking connection and retest
Restore appliance operation only after confirming there are no leaks
Follow local codes and manufacturer instructions
Have a licensed professional inspect the installation if required