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Theinstallationmustconformwithlocalcodesor,intheabsenceof local codes, with the National Fuel Gas Code, ANSI Z223.1.* *Available from the American National Standards Institute, Inc. 1430 Broadway, New York, N.Y. 10018. High Altitudes Foraltitudes/elevations above2,000feet(610m),ratings shouldbe reduced at the rate of 4 percent for each 1,000 feet (305m) above sea level. Contact the manufacturer or your gas company before changing spud/orifice size. Well Head Gas Installations Some natural gas ut