A two-way cleanout is not required if the building drain is extended to a manhole that is how many feet or less from the building?

A two-way cleanout is not required if the building drain is extended to a manhole that is 50 feet or less from the building. This guideline is based on plumbing codes that aim to ensure effective maintenance and cleaning capabilities of the drainage system.

When the distance from the building to the manhole is within this prescribed limit, it is generally considered that access for maintenance is sufficient without the need for a cleanout on both sides. This reduces complexity in the plumbing layout while still providing adequate access for cleaning and service tasks.

In contrast, if the distance exceeds 50 feet, the installation of a two-way cleanout becomes necessary to maintain the system properly, as reaching a manhole further away may complicate cleaning and maintenance efforts. Adding a two-way cleanout allows for more effective cleaning and the ability to address potential blockages from either direction.