Hello,
All the instructions I have seen for doing a pressure test on new natural gas piping say to disconnect the meter, all appliances and all shut-off valves and cap the ends of the lines. What is wrong with just leaving the shut-off valves in place and turning them off? Local code requires a pressure test of 10 psi for 15 minutes, and the WOG ball valves I am using are rated to 600 psi (and tested to 100 psi). So they should handle 10 psi!
Thanks, Wayne