Stormwater in Brisbane
Why Yards Flood
Brisbane gets most of its rain between November and March, and much of it arrives in short, heavy summer storms. A roof can shed a huge volume of water in a few minutes, and all of it has to travel through gutters, downpipes, pits and underground pipe before it leaves your block. If any part of that path is blocked, broken or undersized, the water finds its own way out, usually across the lawn, against the slab or under the house.
Storm season is hard on drains
Leaves, seed pods and roof grit wash down and settle in pits and bends. Tree roots work their way into older clay pipe joints looking for moisture. Reactive clay soils swell when wet and shrink in dry spells, which can crack or shift pipes over the years. The result is a system that copes with light rain and then fails in exactly the storms it was built for.
Where your stormwater should go
On most homes, downpipes connect to an underground line that runs to the kerb, to a street drain or to a drainage line in an easement at the back. Many properties also send roof water through a rainwater tank first, with an overflow pipe carrying the excess into the same system. Either way, water should leave the property in a pipe, not soak in beside the footings.
Keep stormwater out of the sewer
Stormwater and sewer are separate systems. Sewer pipes are sized for household wastewater, not a summer downpour, and roof water plumbed into them can overload the mains and push sewage back up through gullies. Connecting stormwater to the sewer is not permitted, so if we find a downpipe running into a sewer line we will point it out and quote to connect it correctly.
When to call a plumber
Get in touch if a pit stays full a day after rain, water bubbles up out of a grate, a downpipe overflows at the bottom while the gutter above is clear, or a patch of lawn stays soggy for weeks.
You get a free quote and a fixed price before any work starts. Bigger or hidden problems may need an assessment first, credited if the job goes ahead, and the work is backed by our lifetime workmanship guarantee.
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