Here are photos of a circa-1944 Perfex Series 155 Magic Dial Thermostat, as well as the instruction manual.
Levittown Radiant Piping Diagrams
Thanks to Rick Rolston, who provided this rare glimpse into the inner workings of the first radiant systems in the Levitt homes. Now you know where the pipes are! You'll also see that J.D. Brower Plumbing and Heating Company included this radiant heating layout of Levitt homes in their advertisements.
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Perfex Series 155 Magic Dial Thermostat
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