Pittsburgh toilet
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A Pittsburgh toilet is a common fixture in post-World War II houses built in Pittsburgh, Pennsylvania, United States. It consists of a toilet in the basement of the house with no surrounding walls. It was generally used by steel workers before they headed upstairs for supper.
In some cases, walls surrounded the toilet, and often a shower was near the toilet. The toilet was located in the basement so the worker would not track dirt upstairs to the living area of the house.