Roof Rain Water Down Pipe

Sizing a roof water drain.

Roof rain water down pipe.

The building regulation s part h drainage and water disposal requires that adequate provision is made for rainwater to be carried from the roof of buildings. A rainwater downpipe is a pipe that is used to direct rainwater away from a building typically from roof guttering to a drainage system it is sometimes also referred to as a downspout drain spout roof drain pipe or leader. Downpipe fittings and connectors are used to join sections of downpipe together or to connect them to other parts of the guttering system they form waterproof and durable seals ensuring that rainwater is effectively drained away. Water collected by a rain gutter is fed usually via a downpipe also called a leader or conductor from the roof edge to the base of the building where it is either discharged or collected.

The first step in sizing a roof drain is to calculate the surface area of the roof that the drains will be covering as well as the average hourly rainfall rate at the building location. The down pipe can terminate in a shoe and discharge directly onto the surface but using modern construction techniques would be connected through an inspection chamber to a drain that led to a surface. Other roof outlets include stainless steel rainwater outlets cast iron rainwater outlets flat roof drainage outlet solutions and brand specific aco roof outlets and caro roof outlets. Downspouts are most commonly seen attached to the corners of home or building.

Downspouts are drainage pipes that direct rain water from the roof to the ground.