Overflow relief gullies (ORG)


What is an overflow relief gully?

An overflow relief gully (ORG) is a critical part of your sewerage system. They prevent sewage from flooding your house.

ORG's are:

  • drain-like fitting located in the ground outside your home, usually near the laundry area.
  • Designed to overflow sewage onto the ground outside your house, rather than inside the home if there is a blockage in your plumbing or excessive rain water in the sewerage network.

Large houses with a few bathrooms may have more than one overflow relief gully.