To Modify the Nominal Size of a Plumbing Line Segment

1. Select the plumbing line segment in your drawing.
2. Click Home tab Build panel Tools drop-down Properties .
3. On the Design tab of the Properties palette, under Dimensions, specify a different nominal size.
4. Specify a new size for Nominal Size.
   Tip: You can lock Nominal size. When locked, the nominal size list is inactive and the associated diameter cannot be modified. You can, however, still modify the length or elevation of a plumbing object. To turn off a size, unlock this setting on the Properties palette.
   Note: Alternatively, you can select a plumbing line, click Plumbing Line tab Modify panel Modify Plumbing Line , and change the setting for Nominal Size or lock the setting.

   The plumbing line style determines the appearance and function of the line, including size. As a result, the defined plumbing line style dictates the nominal sizes that are available for selection on the Properties palette.

   Note: Since plumbing lines are two-dimensional (2D) only, the size of a plumbing line is for calculation purposes only. Changing the size of a plumbing line does not automatically insert the necessary fitting.