- A clean-out (TEE) shall be provided within 24 inches of a building, or as close as reasonably possible.
- Clean-outs shall be installed at abrupt turns of 90 degrees or higher except where a long radius sweep is used, and in excessively long installations (every 90 feet).
- An approved backflow protection device shall be installed at cleanout nearest to the building. The device shall contain an airtight seal at its upper end and shall be a sewer relief device (i.e., sewer popper), or approved equal.
- All clean-outs shall be brought to the surface. Christy Box with a metal lid shall be installed if necessary to protect from damage or trip hazard.