downpipen.
/ˈdaʊnpʌɪp/, U.S. /ˈdaʊnˌpaɪp/ 1. gen. A pipe leading downwards.
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society > occupation and work > equipment > conveyor > [noun] > conduit, channel, or tube > pipe > other types of pipe
swan-pen1426
service pipe1718
standpipe1728
service1786
jet pipe1795
safety tube1803
gas pipe1807
outlet pipe1837
pipette1839
downpipe1846
nipple1863
downcomer1868
downcome1872
wyea1877
benda1884
Y brancha1884
gas line1887
sparge pipe1910
riser1962
marine riser1972
1846 Hull Packet & E. Riding Times 17 Apr. 8/4 The quantity of water escaping out of the pipes would be..about 33 times the number of gallons the down pipe in the tower could contain.
1870 Engineer 6 May 276/3 As long as the oil in the pan covers the orifice of the down pipe C air cannot find its way into the cistern.
1944 G. E. Mitchell in R. Greenhalgh Pract. Builder vi. 247/1 The heated water is taken direct from the storage cistern to the top of the building, and then injected into the various down pipes in order to serve the hot water points.
1993 F. G. Bell Engin. Treatm. of Soils 96 The simplest type of ejector consists of a downpipe which carries pumped water to an upward-facing nozzle, from which a high velocity jet of water enters the venturi section.
2. Chiefly British. A pipe to carry rainwater from a roof to a drain or to ground level; = downspout n.
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society > inhabiting and dwelling > inhabited place > a building > parts of building > roof > [noun] > downpipe(s)
roan1383
rone1750
fallpipe1846
downpipe1849
downspout1850
rainwater goods1897
1849 Jrnl. Royal Agric. Soc. 10 192/2 Iron guttering and down-pipe, fixed.
1860–4 Dict. Archit. (Archit. Publ. Soc.) Head of a Down Pipe, a sort of small cistern..which receives the water directly from the gutter and conveys it into the..down pipes.
1965 G. Jones Island of Apples i. i. 8 The big black downpipe fastened to the side wall of the pub.
1970 Globe & Mail (Toronto) 28 Sept. 24/3 (advt.) Aluminum eaves, downpipes and upper facings.
2007 Victorian Nov. 29/2 Leafguards..trap leaves before they get into the downpipe but sometimes they just make things worse by damming the gutter.
3. In an internal-combustion engine: a pipe connecting the outlet of an exhaust manifold, turbocharger, or (in later use) catalytic converter to the final vent in the exhaust system, through which gases pass before being expelled from the vehicle.
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society > occupation and work > equipment > machine > machines which impart power > engine > internal-combustion engine > [noun] > parts of > exhaust pipes or apertures
breather pipe1886
exhaust1896
port1913
downpipe1917
plug nozzle1954
1917 U.S. Patent 1,247,930 1/2 The exhaust manifold, adjacent the down pipe thereof is provided with a butterfly valve having a long crank.
1962 Which? Car Suppl. Oct. 139/2 Connection between exhaust manifold and down pipe [was] found to be slack.
2009 R. Bowen & R. Garcia How to build Max-performance Mitsubishi 4G63t Engines iv. 75/1 Continuing down the exhaust system from the O2 sensor is the downpipe, which connects the turbo to the rest of the exhaust system.
This entry has been updated (OED Third Edition, December 2018; most recently modified version published online March 2022).
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n.1846