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dry riser

noun

  1. a vertical pipe, not containing water, having connections on different floors of a building for a fireman's hose to be attached. A fire tender can be connected at the lowest level to make water rise under pressure within the pipe DR
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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