Current water use as calculated using Equation 3-3.
Water use after replacement as calculated using Equation 3-3.
Equation 3-4. Water Savings From Urinal Replacement (gallons per year)
= Current Water Use of Urinal –Water Use of Urinal After Replacement
Current Water Use of Urinal (gallons per year)
Water Use of Urinal After Replacement (gallons per year)
To calculate the simple payback from the water savings associated with replacing an
existing flushing urinal, consider the equipment and installation cost of the replace-
ment flushing urinal, the water savings as calculated in Equation 3-4, and the facility-
specific cost of water and wastewater.
Alliance for Water Efficiency. Urinal Fixtures Introduction.
EPA’s WaterSense program. WaterSense Labeled Urinals.
North Carolina Department of Environment and Natural Resources, et al. May 2009.
Water Efficiency Manual for Commercial, Industrial and Institutional Facilities
Schultz Communications. July 1999.
A Water Conservation Guide for Commercial, Insti-
tutional and Industrial Users
Prepared for the New Mexico Office of the State Engi-
neer. Pages 33–36.