Original heating trade vintage catalog for THE NATIONAL PIPE BENDING COMPANY. Main office and plant was located from 156-168 River Street and 81-131 Lloyd Street of New Haven, CT. Feed water heaters, oil separators are produced. Manufacturers of power plant equipment. Chart for saving by one degree rise in temperature is shown. Disbound from a large 1916 industrial heating catalog, this unique old two page technical specifications brochure would display wonderfully matted and framed. A marvelous addition to your retro heating equipment library. Pages are detached and may contain a small amount of residual glue on edge.