Drains from decks to carry off accumulations of rainwater, condensation or seawater. Scuppers are located in the gutters or waterways, on open decks and connected to pipes usually leading overboard, and, in the corners of the enclosed decks to the bilge.
When leading from an exposed deck or non weathertight spaces, scuppers are to be led overboard and do not need to be provided with valves as long as they consist entirely of pipes of the substantial thickness below the freeboard deck.