Which of the following is a requirement for sewer connections according to plumbing codes?

The requirement to include an inspection chamber or cleanout in sewer connections is essential for several reasons. Inspection chambers, often referred to as cleanouts, provide access points in the sewer system that allow for maintenance, inspection, and cleaning without needing to dig up the entire sewer line. This facilitates the removal of blockages and ensures that the sewer system operates efficiently and in compliance with health and safety standards.

Having designated access points is crucial for the proper functioning of sewage systems, as it helps prevent the buildup of waste and reduces the risk of sewage backups, which can lead to significant health hazards and environmental concerns. This element of the plumbing code ensures that the infrastructure remains maintainable and that any potential issues can be addressed promptly.

In contrast, using copper pipes, placing sewer lines only underground, or allowing the use of any available materials do not encompass the necessary standards for durable, effective, and safe sewer connections mandated by plumbing codes. Copper is not typically used for sewage drainage, as specific materials are required to withstand the corrosive nature of waste. Furthermore, while sewer lines must typically be positioned underground, the critical requirement lies in the inclusion of appropriate access points for maintenance and inspections.