First published as a four-volume set in 1925–1926, Audels Plumbers and Steam Fitters Guide was created as a practical reference for plumbers, steam fitters, apprentices, engineers, builders, and other skilled tradespeople.

Written by Frank D. Graham and Thomas J. Emery, the guide explains the principles and working methods used in plumbing, pipe fitting, steam heating, ventilation, gas fitting, welding, drainage, and related mechanical trades. Its compact size allowed workers to keep it nearby and consult its illustrations, diagrams, charts, formulas, and instructions while studying or completing work in the field.

Steam fitters played an essential role during the steam era. They installed and maintained the piping systems that carried steam from boilers to engines, radiators, manufacturing equipment, and other machinery. Correct pipe sizing, fitting, testing, and maintenance were necessary for these systems to operate safely and efficiently.

Displayed in the Power Mechanical Steam Museum, this guide represents the practical knowledge and craftsmanship required to build and maintain steam-powered systems. It also shows how technical manuals helped pass specialized trade knowledge from experienced professionals to apprentices and future generations.