What does the term "bench mark" refer to in plumbing?

In plumbing and construction, the term "bench mark" specifically refers to a reference point used for measuring elevation. This is crucial for ensuring that plumbing systems are installed at the correct heights and slopes, which is essential for proper drainage and to avoid issues such as backflow. Bench marks serve as a fixed point of known elevation, allowing contractors to accurately determine the elevation of various components relative to that known point.

By using a bench mark, plumbers can achieve precise measurements that are necessary for the installation of fixtures and fittings, avoiding costly mistakes that could arise from improper elevations. This practice ultimately helps ensure the effectiveness and safety of the plumbing system. Understanding how to utilize a bench mark is fundamental for any plumbing contractor, as it affects the overall functionality of the plumbing infrastructure.