15/09/2026
🚽 What is an overflow relief gully—and why does your home need one?
An overflow relief gully, or ORG, is the grated drain found outside many homes. It gives sewage a lower, safer place to escape if the sewer becomes blocked, helping prevent it from backing up through your toilet, shower or floor wastes.
A nearby fixture—often a basin—regularly sends water through the gully to maintain its water seal and stop sewer smells.
To help it work properly:
• Keep the grate loose and clear of soil, leaves and garden mulch.
• Never seal it, cover it or build the surrounding ground above it.
• If wastewater is overflowing from it, stop using water inside and call a plumber—the sewer is likely blocked.
And yes, Canberra locals may notice a familiar Belco landmark watching over this one. 🦉
The Nixon Plumber
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