October 2012
4-39
Equation 4-17. Water Savings From Pre-Rinse Spray Valve Replacement (gallons
per year)
= Current Water Use of Pre-Rinse Spray Valve –Water Use of Pre-Rinse
Spray Valve After Replacement
Where:
••
Current Water Use of Pre-Rinse Spray Valve (gallons per year)
••
Water Use of Pre-Rinse Spray Valve After Replacement (gallons per year)
Payback
To calculate the simple payback from the water savings associated with replacing
an existing pre-rinse spray valve, consider the equipment cost of the replacement
pre-rinse spray valve, the water savings as calculated using Equation 4-17, and the
facility-specific cost of water and wastewater. Pre-rinse spray valves typically cost less
than $100.
By replacing a pre-rinse spray valve with a more efficient model, facilities can also
save a significant amount of energy due to the reduction in hot water use. This
energy savings will further reduce the payback period and increase replacement
cost-effectiveness.
Additional Resources
Alliance for Water Efficiency. Commercial Food Service Introduction.
DOE, Energy Efficiency & Renewable Energy, Federal Energy Management Program.
Covered Product Category: Pre-Rinse Spray Valves.
.
EPA’s WaterSense program. Pre-Rinse Spray Valves.
.
Food Service Technology Center. Commercial Kitchen Equipment—Pre-Rinse Spray
Valves.
4.8
Pre-Rinse Spray Valves
