Cleanouts must be installed on building sewers at intervals not to exceed how many feet?

Cleanouts are critical components of a plumbing system, particularly in building sewers, as they provide access for maintenance and cleaning of the sewage system. According to the Omaha Plumbing Code, cleanouts need to be installed at regular intervals to ensure that blockages can be easily addressed without extensive excavation.

The requirement is specifically set at intervals not to exceed 100 feet for building sewers. This distance is considered appropriate to allow for effective cleaning and maintenance while minimizing the risk of significant blockages between cleanout points.

Thus, the option stating an interval of 150 feet is incorrect because it does not align with the stringent requirements for maintaining effective and accessible sewer systems. Regular intervals of cleanouts play a crucial role in plumbing efficiency and code compliance, making the specified maximum interval essential for optimal sewer system functionality.