What Is a Drainage Catch Basin?

A catch basin collects and traps debris in storm drains and sewer systems, preventing it from entering drainage pipes. Catch basins in storm drains are larger models of basins used in homes. Sewer and storm catch basins are typically maintained by public works or municipal crews, while home catch basins are the responsibility of property owners.

Catch basin grating covers the ends of storm drains and sewage pipes. The drain sections have sloped designs that collect runoff with minimal overflow. Small particles, such as cinders, pieces of leaves or dirt, slip through the grates, but settle to the bottom of the catch basin. Drainage pipes and screens beneath the basin ensure that water flowing into the storm system is free of sediment and other runoff catch basin debris.

Household or private property catch basin models include French drains and splash block downspout extensions. Underground French drains include a perforated pipe that is encased in gravel and heavy landscaping fabric. French drains direct water runoff from underground along foundations to other outlets, such as sidewalks and streets. Connect downspout pipes to French drains when other adequate methods of redirection are not available.

Install splash block catch basins, also commonly known as downspout extensions, at the bottoms of downspouts to direct roof runoff to suitable areas. A basic splash block design includes corrugated plastic pipe with a wire covering or screen attached to the drainage end.