The National Fuel Gas Code covers all aspects of fuel gas piping, combustion air, venting and appliance installation requirements from the utility meter to the end use appliance. See the code's origin, development and scope as published in the 1999 Code. These files are provided in PDF format. In most cases, the PDF files will open directly in your browser window. If you do not have the Acrobat PDF Reader, you may download it for free. File is attached below under "Related Files."