What type of receptacle is installed at a corner wall to collect rainwater from a balcony?

The type of receptacle that is specifically designed to collect rainwater from a balcony, especially when it is situated at a corner wall, is known as a scupper drain. Scuppers are openings in the walls of a building that allow for the drainage of accumulated water, which is particularly useful in preventing water from pooling on flat or sloped surfaces like balconies and roofs.

When installed in the corner of a balcony, the scupper drain effectively gathers rainwater and directs it away from the building structure, reducing the risk of water damage and promoting proper drainage. This ensures that the water is managed efficiently, preventing overflow and potential structural issues.

While downspouts and roof drains are also related to water drainage systems, they are designed for different applications. Downspouts are typically used in conjunction with gutters to funnel water from the roof down to the ground, while roof drains are usually integrated into the roof structure itself to collect and move water off large flat roofing surfaces. The bee-hive roof drain serves a similar purpose to other roof drains but with a specific design that may not be as applicable for balcony situations. Thus, the scupper drain is the most suitable choice for collecting rainwater from a balcony, particularly at corner locations.