Stormwater Drainage Casuarina Residents Have Relied On for 20 Years

Stormwater drainage carries rainwater, roof runoff and surface water away from your property to the legal point of discharge, while sewer drainage carries wastewater from your toilets, sinks and showers to the sewer main. These two systems are meant to remain completely separate. Unfortunately, we sometimes find properties where a stormwater line has been accidentally or illegally connected to the sewer, which can cause overflows, bad odours and compliance issues with council.

Yes, and it's more common than most people expect, particularly on established blocks with mature trees near the drainage line. Roots are drawn to the moisture inside stormwater pipes and will work their way into even the smallest crack or joint, gradually widening it and restricting flow. Once inside, roots can cause blockages, cracks and eventually full collapses if left unaddressed, which is why root removal and pipe relining often go hand in hand.

Persistent yard flooding usually comes down to one of a few causes: undersized or blocked stormwater pipes, poor site grading that directs water toward the house instead of away from it, or a stormwater system that was never properly connected to a legal point of discharge. Older properties throughout Casuarina sometimes have drainage that simply wasn't designed for the volume of rainfall we now experience, which is where ag drains, additional pits or a full drainage upgrade can make a real difference.

The legal point of discharge is the specific location, set by council, where stormwater from your property is permitted to leave the site, whether that's a kerb outlet, an interallotment drain or a council stormwater main. Discharging water anywhere else, including directly onto a neighbouring property, can create disputes and breach local council requirements. Confirming and correcting your legal point of discharge protects you from compliance issues down the track and helps stop water being redirected where it shouldn't go.

Yes, a pre-purchase plumbing inspection can include a CCTV assessment of the stormwater system, which is particularly useful for older homes or properties with mature gardens where root intrusion is more likely. This gives you a clear picture of the condition of the pipes, pits and connections before you commit to buying, so there are no unexpected drainage surprises waiting once you move in.