What type of pipe should a building drain pass through when installed in a foundation wall?

• A. Rigid pipe
• B. Flexible pipe
• C. Pipe sleeve
• D. Drainage pipe

Answer: (C)

A pipe sleeve is specifically designed to be a protective conduit for piping that passes through a concrete foundation wall. It is important for preventing direct contact between the pipe and the concrete, which can lead to damage or failure of the pipe due to expansion, contraction, or corrosion. By using a sleeve, it also allows for some movement and reduces the risk of water intrusion, as it creates a barrier that can help manage drainage effectively.

In addition, pipe sleeves can aid in the inspection process and maintenance, as they provide an easier path for any necessary repairs or replacements of the piping system without needing to break through the concrete. Overall, utilizing a pipe sleeve enhances the durability and longevity of the plumbing installations within the structural walls of a building.