Basic HTML Version

7-36

October 2012

Where:

••

Water Efficiency (gallons per load)

••

Number of Loads (number of loads per day)

••

Days of Operation (days of cage, rack, bottle, or tunnel washer opera-

tion per year)

Water Use After Replacement

To estimate the water use after replacing an existing cage, rack, bottle, or tunnel

washer, use Equation 7-11, substituting the water efficiency of the replacement

washer. The water efficiency of the replacement washer should be provided by the

product manufacturer. More recent models of washers can use up to 90 percent less

water per load when compared to older, less efficient units by reusing rinse water

and having shorter rinse and wash cycles. If the number of rinse cycles can be se-

lected, base the water use on the water efficiency associated with the average fewest

number of rinse cycles needed for effective washing operations.

Water Savings

To calculate the water savings that can be achieved from replacing an existing cage,

rack, bottle, or tunnel washer, identify the following information and use Equation 7-12:

••

Current water use as calculated using Equation 7-11.

••

Water use after replacement as calculated using Equation 7-11.

Where:

••

Current Water Use of Cage, Rack, Bottle, or Tunnel Washer (gallons

per year)

••

Water Use After Cage, Rack, Bottle, or Tunnel Washer Replacement

(

gallons per year)