Creating a Sanitary System

Both plumbing fixtures must be assigned to a Sanitary system, but because the flow in a sanitary system depends on gravity, the piping should be sloped. The Generate Layout tools let you specify the layout and the slope for much of the sanitary system. However, some modifications, such as vents and traps, and connections between different building levels must be made manually. Begin by creating the sanitary system.

  1. In the Project Browser, right-click the plan view for your plumbing plan, click Apply View Template, and select Plumbing Plan from the Select View Template dialog.
  2. Click Analyze tabSystem Browser panel (System Browser).

    The System Browser can also be opened by pressing F9. It will be used to verify that all of the plumbing fixtures are assigned to a system.

  3. Dock the System Browser at the bottom of your screen, right click a column header, and click ViewPiping.

    Before creating the system, the plumbing fixtures are listed as the Default Sanitary plumbing system under the Unassigned folder in the System Browser.

  4. In the Project Browser, double-click your plumbing plan view, select all of the plumbing fixtures for the system.
  5. Click Modify Plumbing Fixtures tabCreate Systems panel (Create Sanitary System).

    The plumbing fixtures have now been assigned to a Sanitary system at the Piping level in the System Browser.

Layout Piping for the Sanitary system

  1. The Generate Layout tools let you define the layout for piping in the sanitary system.

    Open a 3D view showing the plumbing fixtures, and enter the keyboard shortcut, WT to tile the views.

  2. In the plan view, select one of the plumbing fixtures in the sanitary system.
  3. Click Modify Piping Systems tabLayout panel (Generate Layout).
  4. If more than one system has been created for the fixture, in the Select a System dialog, select the new sanitary system, and click OK.

    The Generate Layout tab is activated.

  5. Select Solutions on the Generate Layout panel, and on the Options Bar, click Settings.
  6. In the Pipe Conversion dialog, specify the type of pipe and the offset for the Main and Branch segments of sanitary piping.
  7. For this example, the Main and Branch are set for a Pipe Type: PVC, and an Offset of -1' 6" (-450 mm), which places the piping below the level associated with the current level in the plan view.

    Click OK.
  8. On the Options Bar, enter a value for Slope; for this example, 1/8" /12" (32 mm)
  9. Accept the default plumbing Solution Type: Network, and click or to cycle through the proposed routing solutions to select the that best fits the plan. For more information about Solution Types, see Generate Layout.
  10. If necessary, click Modify, and reposition pipe segments to avoid obstructions.

  11. Click Finish Layout when you are satisfied with the routing of the piping for the system.

    The piping is created according to the specifications in the Conversion Settings dialog and on the Options Bar.

    NoteLocal building codes often require 45 degree junctions for waste plumbing. See Changing the Angle for a Fitting Leg to learn how to modify a 90 degree fitting.

Create a vent

  1. You can create a vent by upgrading a pipe fitting and drawing a vertical segment to serve as the vent.

    Select the elbow connecting the vertical pipe to the sanitary main pipe from the back of the toilet, and click the plus sign above the elbow to upgrade the fitting to a tee.

  2. Select the floor plan view, select the tee fitting, and highlight the connector on the tee.

    The lower connector is the first connector highlighted.

    NoteThe connector symbol may not be visible. Instead you will see a highlighted square.
    Press Tab once to highlight the upper connector (a slightly larger highlighted square), right-click the connector, and click Draw Pipe.

  3. On the Options Bar, enter 8' 0" (250 cm) for Offset, click Apply, and click Modify.