This online course covers the most commonly used UPC method of sizing water distribution systems as described in Code sections 610.7 - 610.9. This is the sizing that will be used in the course you are beginning. It should be noted that the Uniform Plumbing Code offers three other ways to size water piping systems. Appendix A is useful in sizing larger systems, especially if the water supply fixture units and length limits in Table 6-6 are exceeded. Appendix L allows for separate fixtures in a bathroom to be sized as a group. This allows for large apartment complexes and condos to be more economically sized. Footnote three in Table 6-5 permits fixtures, in branches that are supplied with both hot and cold piping, to be assigned 75 percent of their Table 6-5 values. The benefit, in larger installations is cost savings that could result from smaller pipe sizes being required. The authority having jurisdiction should be consulted before using any option other than the standard sizing method. This class has been approved by the Plumbing and Mechanical Systems Board for two hours of plumbing discipline.