A water distribution system for a small office building is being sized. The system has a total demand of 35 water supply fixture units (WSFU). Using Table 610.4 for copper tubing (Type L), what is the minimum size for the building supply pipe if the developed length is 80 feet?

• 2 inch
• 1 1/4 inch
• 1 1/2 inch
• 1 inch