Stormwater Problems in Thomastown
Thomastown sits on relatively flat ground in Melbourne's north — and flat ground means water doesn't move the way it should. After heavy rain, yards pond, paths flood, and water finds its way into subfloors and garages. Most of the time, the problem isn't the volume of rain. It's that the stormwater drainage hasn't been set up to handle it.
Thomastown's housing mix — post-war fibro and brick homes alongside newer estates — means there's a wide range of drainage setups across the suburb. Older properties often have minimal stormwater infrastructure, while newer developments sometimes have undersized pits that can't handle the actual runoff from the block.
What a New Stormwater Drain Installation Involves
When we install a new stormwater drain run in Thomastown, the goal is to get water off the property quickly and into the legal point of discharge — whether that's the council pit at the kerb, an approved soakage system, or an existing connection point. A long drain run like the one pictured above is typical for properties where the collection point (a downpipe, patio drain, or surface inlet) is far from the discharge point.
- Site assessment: We walk the block, identify where water collects, and design a drainage path that follows the natural fall where possible
- Grade calculation: Stormwater lines need a minimum fall of 1:100 — not steep enough and sediment builds up; too steep and the water outruns itself. We calculate this properly before digging
- Trench and pipe installation: We trench to the required depth, bed the pipe on compacted sand, and lay the line with fittings at every change of direction
- Inlet and outlet: Surface inlet pits, downpipe connections, and discharge points are all installed to spec
- Backfill and surface reinstatement: We compact the backfill correctly — poorly compacted trenches sink over time and crack the pipes beneath
Thomastown properties are in the Whittlesea Council area. Stormwater must be discharged to the legal point of discharge — typically the kerb and channel, or a council-approved soakage system. We ensure all installations meet council requirements.
Common Stormwater Issues We Fix in Thomastown
Usually caused by insufficient or missing surface drainage. We install pits, channel drains, or new pipe runs to shift the water.
Many older Thomastown homes have downpipes that discharge onto the soil beside the house — a guaranteed path to subfloor dampness and footing erosion.
Sediment, root intrusion, and collapsed sections block stormwater pipes just like sewers. CCTV camera inspection tells us exactly where the problem is.
Older properties often have 300mm pits that can't handle a modern roof's runoff. We upsize pits and add overflow relief where required.
Stormwater vs Sewer — Why It Matters
One of the most common and serious drainage mistakes we see is stormwater being illegally connected to the sewer. The sewer system isn't designed to handle high-volume rain events — even a single illegal connection can overwhelm the system and cause sewage to back up into homes during heavy rain.
We always confirm where stormwater is being discharged and make sure the connection is legal. If we find an illegal cross-connection on a property, we'll advise you before we start work.
Stormwater Problem in Thomastown?
Yard flooding, blocked stormwater drains or new drain installation — call us for a fixed-price assessment.