Fill out the LEED Online credit form. The total calculated flush-fixture water-use for the baseline and design cases will be automatically generated once the WEp1 credit form is filled out. You will need to provide information on annual reused water amount and, and if necessary, plumbing drawings or calculations illustrating that your non-potable water systems are capable of supporting the quantities determined.
If reusing graywater or rainwater, or treating wastewater onsite, ensure that the key system components, such as treatment and collection facilities, are not eliminated during value engineering.
Consider including signage for water reduction strategies that may require special instructions for use. These may include: occupant signage for operating dual-flush toilets, waterless urinals and composting toilets, and for indicating non-potable water—and operational signage for distinguishing the pipes that carry reused water. Purple piping is commonly used for reclaimed water and, more recently, for recycled graywater.
Be certain that the contractors reviewing construction documents understand the purpose of any dual-plumbing system in the plans. Misunderstandings about plumbing can lead to costly and unsanitary mistakes—like cross-connection with potable water lines.
Include any low-flow or waterless fixtures, water reuse systems, or onsite wastewater treatment systems in your construction and design development documentation.
Regularly remind contractors and subcontractors of the limited site disturbance plan. Orient new contractors as they come to the project during later stages of construction.
Incorporate carefully defined staging areas for construction activities and contained construction entrances to minimize damage to the protected greenfield area.
