What should you do if a benchmark cannot be located during installation?

When a benchmark cannot be located during installation, it is important to use a point of known elevation to ensure that all measurements are accurate and reliable. This is crucial in plumbing systems, where precise elevations are necessary to maintain proper flow and function. Locating an alternative point of known elevation allows for accurate leveling and alignment of piping, fixtures, and other components.

Using another point of known elevation mitigates the risk of errors that could arise from relying on potentially inaccurate or unofficial reference points. This method helps in maintaining compliance with local building codes and plumbing standards, ultimately ensuring the integrity of the installation.

Relying on nearby buildings or consulting with the plumbing inspector, while they may provide some assistance, do not directly solve the problem of establishing an accurate reference point for elevation in the same way as locating another known benchmark does. Digital measuring tools are useful for various tasks but do not inherently provide an elevation reference if an established benchmark is not available. Thus, identifying another suitable elevation point is the most effective and reliable approach in this scenario.