The 2009 UPC water system sizing calculator is one of the best tools used to determine the minimum fixture branch type size. The table is 6-5 and contains Supply Fixture Units and Minimum. The 2009 UPC Water System Sizing Calculator is in stock and is protected by our guarantee. This is a vital tool to plumbers working in the residential or commercial industries. See our bulk price below to outfit your entire work force with accurate information through this handy reference.