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Greenstein Plumber
Thu, 05/13/2004 - 08:56 — deadprogrammer
A drying machine duct that serves both as an advertisement and a piece of artwork. Running Themes100 Views of the Empire State Building
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Comments
That is a fresh air inlet. It is connected to the building's main drain near the main house trap. It allows the drainage system to maintain air pressures near atmospheric, so that waste water will drain properly.
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