What is the appropriate way to document whether a bathroom sink qualifies for an indoor water use reduction?

Documentation of whether a bathroom sink qualifies for an indoor water use reduction is effectively achieved through the use of fixture cut sheets. Fixture cut sheets provide detailed specifications and performance data for plumbing fixtures, including water flow rates, efficiency ratings, and product dimensions. These documents are essential in verifying compliance with Water Efficiency credit requirements in LEED, as they contain the necessary information to assess if the sink meets the established standards for water usage reduction.

In contrast, usage logs track actual water consumption over time, which, while informative for assessing overall performance, do not provide the specifications needed for qualification. Building plans offer a visual representation of the layout and design but typically lack detailed technical data on fixtures. Inspection reports may confirm the installation of fixtures but do not usually contain the specific performance metrics necessary to determine eligibility for a water use reduction credit. Therefore, fixture cut sheets are the most appropriate and direct method for documenting the qualifications of bathroom sinks in relation to indoor water use reduction.