What is one effective way for a restaurant located on the second floor to decrease indoor water use demand?

Installing high efficiency toilets is an effective strategy for a restaurant, particularly one located on the second floor, to significantly decrease indoor water use demand. These fixtures are designed to use less water per flush compared to standard toilets, which means they can help reduce overall water consumption without sacrificing performance.

For a restaurant, where facilities are likely used frequently throughout the day, the cumulative water savings from high efficiency toilets can lead to substantial reductions in water use. This is particularly beneficial in a restaurant setting where there may be high turnover and demand on plumbing fixtures.

While automatic faucets can also help conserve water by shutting off when not in use, the impact of high efficiency toilets can be more pronounced because they address one of the largest sources of indoor water use. Standard toilets typically use around 1.6 gallons per flush, while high efficiency models can use as little as 1.28 gallons or less, demonstrating a clear improvement in water efficiency.

Increasing the number of sinks would likely lead to greater water use rather than decreasing it, making it an ineffectual approach for reducing demand. Therefore, the installation of high efficiency toilets stands out as the most strategic choice for achieving water use reductions in this context.