To Size Sanitary Plumbing Lines

Sanitary plumbing line sizing is typically required for sanitary black water system types. When you create sanitary system types for gray water, you need to define the system type as Waste in order for the sizing to work.

If you are working on a sanitary system in a building that contains multiple floors, see To Size Sanitary Plumbing Lines for Multiple Floors.

Danger: If you make any modifications to the sanitary plumbing system, you need to resize the plumbing lines.

To size sanitary plumbing lines

1. Complete a draft of the sanitary system.
2. Select a run whose system type is Waste.
   Note: You cannot size systems whose system type is Storm Drain.

   The software highlights all plumbing lines, fittings, and fixtures connected to, and downstream from the plumbing line.

3. Click Plumbing Line tab Calculation panel Size Plumbing Line .
   Note: To calculate sizing values without resizing the run, access the sizing calculator by clicking Analyze tab Plumbing Panel Size Plumbing , and then press Enter at the command prompt.

   The software displays the Size Sanitary Plumbing Line dialog box.

4. In the Size Sanitary Plumbing Line dialog box, under Design Values, select the plumbing line sizing table definition that you created based on applicable codes, such as the Uniform Plumbing Code.

   The software uses the table definition to determine the maximum permissible fixture unit loads for the type of run that you specify in the next step.

   Tip: To examine the table definition in order to verify its accuracy, click the Plumbing Line Sizing Table icon.
5. Select a type of plumbing line for Base Sizing On. You can base the sizing on a branch, offset or home drain, or stack.

   The non-editable sections in the Size Sanitary Plumbing Line dialog box contain the results of the sizing calculations. For more information, see Reviewing the Results of the Sanitary Pipe Sizing.

6. Click OK to resize the system.