A residential piping arrangement is to be sized for the minimum size allowed by Code. The drainage system has the following fixtures: 2 -1.6 gpf water closets, 2 clothes washers, 2 kitchen sinks, 2 lavs, 2 bath tubs. What is the total DFU`s?

A residential piping arrangement is to be sized for the minimum size allowed by Code. The drainage system has the following fixtures: 2 -1.6 gpf water closets, 2 clothes washers, 2 kitchen sinks, 2 lavs, 2 bath tubs. What is the total DFU`s?