Definition of downcomer in English:

downcomer

noun

  • 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.’

Pronunciation

downcomer

/ˈdaʊnkʌmə/