O-E Vapor System Manual
This manual was created by O-E Specialty Manufacturing Co. and outlines how to install the "O-E" Perfect System, which is a Vapor Vacuum heating system.
Minneapolis-Honeywell Diaphragm Gas Valves
Here are the installation instructions for Minneapolis-Honeywell diaphragm gas valves, dated October 1, 1945. Thanks to Mike Zydiak for sharing this with us.
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