The contractor should ensure that the correct fixtures have been purchased and that applicable water reuse systems or specified metering systems have been installed.
Design and size graywater and rainwater systems to match non-potable water demand for needs such as toilet flushing, cooling tower makeup, and irrigation.
Select water-efficient fixtures and strategies. Gather information on applicable fixtures, including manufacturer, model number, and flush or flow rates.
Run preliminary water use calculations to establish the baseline water use and confirm goals for water-use reduction. This should include clearly identifying target flow and flush rates for fixtures.
Determine user groups for the various water fixtures, as not all occupants may be using all fixtures. For example in an elementary school, teacher restrooms and student toilets have different usage patterns that would affect the water use calculations if the fixtures were different. For example:
Determine user groups for the various water fixtures, as not all occupants may be using all fixtures. For example, employee restrooms and customer toilets in a retail store have different usage patterns that would affect the water use calculations if the fixtures were different. For example:
Determine the number and types of occupants in the building. The water-use calculations are based on occupant use and the number of full-time equivalent (
Consider replacing potable water use with alternative sources such as collected graywater, rainwater, municipally supplied treated wastewater, or wastewater treated onsite for reuse.