What does downpipe mean?
A downpipe is a vertical pipe attached to the exterior of a building that conveys rainwater collected by the roof gutters safely down to a drain, soakaway, or ground level. It is the everyday British English term for what Americans call a downspout, and it sits at the heart of any rainwater drainage system alongside gutters, hoppers, and shoe outlets. Downpipes are made from materials such as uPVC, aluminium, cast iron, and galvanised steel, with cast-iron examples still visible on many Victorian buildings. Because a faulty downpipe can cause damp walls, overflowing gutters, and even foundation damage, the word appears constantly in building maintenance and roofing contexts: pipes get described as blocked, leaking, cracked, or in need of replacement. Though technical in origin, downpipe is familiar to most homeowners and is entirely neutral in tone.
nounA vertical pipe that carries rainwater from a roof gutter down to the ground or a drain. The standard British English term for what American English usually calls a downspout.
- A vertical pipe fixed to the outside of a building to carry rainwater from the roof gutters down to a drain or ground level.
"Rainwater gushed from the blocked downpipe and pooled against the garden wall."
"The builder replaced the rusted cast-iron downpipe with a uPVC one."
"Leaves had clogged the downpipe, so water overflowed from the gutter every time it rained."
Standard regular plural; commonly used when describing a building's full rainwater system.
"All four cast-iron downpipes were stripped and repainted."
In America they say downspout, in Britain downpipe — but either way, this humble pipe quietly protects your home's foundations by steering thousands of litres of rain away every year.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of downpipe
Downpipe is a straightforward English compound of 'down' (Old English 'dūn', indicating downward direction) and 'pipe' (from Old English 'pipe', itself borrowed from Latin 'pipare', meaning to chirp or peep, via its sense of a small tube). The compound arose in building terminology to describe a pipe running downwards from the roofline. Its American counterpart, downspout, uses 'spout' instead, reflecting differing naming traditions rather than different objects.
How downpipe is actually used
Downpipe is chiefly British English; American speakers typically say downspout, while 'leader' is an older regional American variant. The word belongs mainly to building, roofing, and plumbing contexts and is neutral in register.
Easily confused with downpipe
A drainpipe is any pipe carrying waste water, often the underground or horizontal soil pipe, while a downpipe specifically carries rainwater vertically down the outside of a building.
A downspout is simply the American English equivalent of a downpipe; both mean the same thing.