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.
The Danger of Food Contamination by Aluminum
Larry Weingarten, who knows more about water heaters than most of us, shared this circa-1932 booklet about The Danger of Food Contamination by Aluminum. We include it in the Water Heater section because some water heaters have aluminum anode rods.
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