Definition of downcomer in English:


Pronunciation /ˈdounˌkəmər/ /ˈdaʊnˌkəmər/


  • A pipe for the downward transport of water or gas from the top of a furnace or boiler.

    ‘They responded by putting forward a new plan - using the tides of the Huangpu to wash the existing downcomers and main sewer regularly.’
    • ‘The size and number of downcomers installed varies from one type of boiler to another, but downcomers are installed in all naval boilers.’