Rhode Island Journeyman Plumber Practice Exam

What is the minimum supply tube size required for a one-piece toilet?

1. 1/2"

2. 3/4"

3. 1"

4. Conductor

The correct answer is: Conductor

The correct answer identifies the appropriate requirements for water supply to a one-piece toilet. A one-piece toilet typically connects directly to a supply line that must provide an adequate flow of water for efficient flushing and refill after each use. The term "conductor" in this context may relate to the broader category of supply lines or connectors that ensure proper water flow and configuration for plumbing fixtures. In practice, actual supply tube sizes for toilets usually range from 1/2" to 3/4", depending on various factors like the model and manufacturer's specifications. However, understanding that some installations may require specific configurations or connections may suggest a broader interpretation of "conductor" as encompassing multiple aspects of plumbing connections. This choice emphasizes a broader understanding of plumbing systems, urging compliance with local codes and the specifications of the chosen plumbing fixture. A pressurized water national standard typically governs these decisions, suggesting that a specific "minimum" supply line size can often be defined by factors beyond just the physical size of the tube. Thus, the correct interpretation embraces both the technical and contextual aspects of plumbing installation standards.