Where surface drainage handles rain as it falls, subsoil drainage handles water already in the ground: seepage on sloping blocks, high water tables and springs. Slotted pipe in geotextile-wrapped gravel intercepts the flow and delivers it to lawful discharge points.
Brisbane's hillside suburbs rely on it heavily — behind retaining walls, beside cut faces and under habitable rooms built into slopes.
Controls groundwater to protect structures and usable land.
Sloping blocks, retaining walls, basement perimeters and boggy ground.
A CCTV drain inspection is the standard way to confirm whether this is what's happening in your pipes: the camera shows the condition on screen, a locator pinpoints the exact position and depth, and you get a recorded report before any repair decisions are made.
A CCTV drain inspection shows exactly what's happening inside your pipes — no guesswork.