Downpipe

Downpipes are an essential component of the roof drainage system, providing the vertical connection between gutters and the underground stormwater network. In Australia, downpipes are typically made from Colorbond steel, PVC, or copper, and are available in round (90mm diameter) or square (100mm x 75mm) profiles. The size and number of downpipes required is determined by the roof area draining to each gutter run and the expected rainfall intensity for the location, as specified in AS/NZS 3500.3 (Plumbing and Drainage — Stormwater Drainage). Each downpipe is connected to the gutter via a rainwater head (also called a sump or conductor head) or a direct pop connection. At ground level, the downpipe discharges into a stormwater pit or pipe connected to the municipal stormwater system, or to an on-site solution such as a rainwater tank or absorption trench. In Gippsland, many older properties have undersized or insufficient downpipes, which can lead to gutter overflow during the heavy rainfall events common in the region. Downpipes should be secured to the building with brackets at regular intervals (typically every 1.8 metres) and must be kept clear of blockages caused by leaf accumulation or foreign objects. Town & Country Roofing installs, replaces, and re-routes downpipes as part of gutter installation, gutter replacement, and general roofing services.