work per estimate - replace the existing galvanized piping with black iron piping. Technicians will need to turn the gas off to the existing piping. Once it has been turned off, technicians will remove the existing galvanized piping. Once the existing galvanized piping has been removed, technicians will install the new black iron piping. Once all proper connections have been made to the new installations, technicians will turn the gas back on. Upon restoring gas, technicians will perform a pressure test to make sure the line is not leaking.