(bokmål) nedløpsrør betyr engelsk

downpipe▼(drainpipe connecting a roof-line gutter with the ground)
noun
[UK: ˈdaʊn.paɪp] [US: ˈdaʊn.paɪp]

downspout▼(vertical pipe or conduit)
noun
[UK: dˈaʊnspaʊt] [US: dˈaʊnspaʊt]