An ORG (Overflow Relief Gully) is an important part of your home’s sewer drainage system, but many homeowners don’t know what it is until there’s a problem.
Usually located outside your home near an external wall, an ORG looks like a small grated drain set into the ground. Its purpose is to act as a safety release point for your sewer system.
If a blockage occurs in your sewer line, wastewater needs somewhere to escape. The ORG is designed to allow that overflow to discharge outside your home rather than backing up through internal fixtures like toilets, showers, or sinks. While it can be unpleasant to see overflowing wastewater outside, it’s actually doing exactly what it was designed to do — protecting your home from internal flooding and damage.
If your ORG is overflowing, it’s usually a strong sign that there is a blockage somewhere in your sewer line. Common causes include tree root intrusion, built-up debris, collapsed pipework, or foreign objects lodged in the drain.
Some common warning signs to watch for include:
- Water or wastewater overflowing from the ORG
- Gurgling sounds from toilets or drains
- Slow-draining sinks, showers, or baths
- Toilets struggling to flush properly
- Unpleasant sewer smells around the property
An overflowing ORG should never be ignored. While it may seem like an outdoor drainage issue, it often indicates a larger sewer blockage that requires professional attention.
At H2Pro, we use specialised drain clearing equipment and CCTV drain cameras to quickly locate the cause of the blockage and clear it safely, restoring proper flow and helping prevent future issues.