The overflow relief gully, or ORG, is a deliberate weak point in the drainage system. Its grate sits at least 150 mm below the lowest indoor fixture, so if the sewer surcharges or blocks, wastewater pops the grate and spills into the yard rather than through the bathroom floor.
An ORG that is paved over, raised, or covered by pot plants can no longer do its job — one of the most common defects found during drainage inspections.
Provides a safe external overflow point when the sewer drain blocks or surcharges.
In the ground outside, often near a bathroom or laundry wall, with a loose grated cap.
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.