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Do a right-click on a numbered pipe run button
.The following context menu opens.

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Select the menu item Pipe Run Options....
The Pipe Run Options dialog opens.

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Use the Outlet drop-down list to specify which outlet of the basement manifold should supply this pipe run.
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If necessary, use the arrow keys
to switch to other pipe runs and change the assignment to the basement manifold there as well. -
Close the dialog with OK.
You have assigned the pipe runs to outlets on the basement manifold.
Example: Pipe run 1 has been assigned to outlet 1 of the basement manifold and pipe runs 2 and 3 have been assigned to outlet 2.
