To follow the prescriptive path, choose four of these five equipment types and meet the given water use requirements.

Clothes washers: 7.5 gallons/ft3/cycle
Dishwashers: 1.0 gallons/rack
Ice machines: For greater than 175 lbs. per day, 20 gallons per 100 lbs. For less than 175 lbs., 30 gallons per 100 lbs. 
Food steamers: 2 gallons/hour
Pre-rinse spray valves: 1.4 gallons/minute