Check the listing for details. Vintage Instruction Manuel For Residential Water Heaters. Condition: Used. Listed at 10.00 USD. The vintage instruction manual for residential water heaters is a rare and valuable piece of scientific history. This collectible item provides detailed instructions on the operation and maintenance of early water heating systems, offering a unique glimpse into the technology of the past. It is a valuable resource for collectors of scientific instruments and thermometers, as well as for those interested in the history of heating systems in residential settings. Circa 1993
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