What is a channel drain (ACO drain)?

A channel drain is a narrow trough set into or along the edge of a driveway, patio, or terrace that captures surface water before it pools on the paved area. The system works by guiding water from the surrounding surface into the channel, which then directs it toward a soakaway, gulley, or surface water system. In Cheltenham, where rainfall is consistent, these drains solve the common problem of water gathering on level or slightly sloped paved surfaces.

The channels are typically made from concrete, plastic, or metal grates (with ACO being a widely used commercial brand), and sit either level with the finished paving or slightly recessed depending on the design. Water enters through the opening and flows along the channel's length, preventing puddles and potential damage to the surface below.

Channel drains are particularly useful at property boundaries, around the bases of walls, or where a patio meets lawn or landscaping, as they stop water from spilling onto adjacent areas. They are a practical consideration when installing or renovating paved surfaces, especially if the site has poor natural drainage or regular standing water.