Scupper
（重定向自Freeing port）
![Two scuppers cut into either side of this outdoor stairwell prevent water from building up and making the stairs slippery.](/Images/godic/202501/14/Scuppers5343.jpg")
![Ship's bulwark and scupper in Russian and English](/Images/godic/202501/14/Bulwark5343.jpg")
A scupper is an opening in the side walls of an open-air structure, for purposes of draining water. They are usually placed at or near ground level, and allow rain or liquids to flow off the side of the open-air structure, instead of pooling within the walls.