Discharge capacity

The discharge capacity (or rainwater drainage rate) refers to the ability of a downpipe to continuously evacuate rainwater without the risk of blockages. This parameter is essential to ensure efficient drainage and to prevent water pooling or infiltration.

This guide will help you understand the factors that influence drainage capacity, such as the condition of the downpipe, which must be clean and intact to ensure optimal performance. The connection pipe also plays a key role: its length, diameter, and the presence of bends can reduce flow capacity. Installation conditions must be evaluated on a case-by-case basis to ensure the efficiency of the drainage system.

Learn how to calculate drainage capacity and optimize surface water management with our technical guide.