What is a distribution run in plumbing design?

In plumbing design, a distribution run refers to the layout and implementation of a system that delivers water from a centralized source to various fixtures throughout a building or facility. This centralized water distribution system typically utilizes dedicated lines that branch out, ensuring an adequate supply of water to bathrooms, kitchens, and other areas requiring plumbing services.

The focus on dedicated lines signifies the importance of having individualized pathways for water, which can reduce issues such as contamination and pressure loss that may occur in a more shared or less organized system. By utilizing a distribution run effectively, plumbing systems can deliver water efficiently while maintaining proper flow rates and pressure for each point of use.

This highlights the significance of option A as the correct answer, as it accurately describes the essence of what a distribution run encompasses within plumbing design, emphasizing its role in facilitating a reliable and efficient water supply to various parts of a structure. Other options refer to different aspects of plumbing or water management, but they do not encapsulate the core concept of distribution runs in plumbing design.