Product(s):	SewerCAD, SewerGEMS, CivilStorm, StormCAD
	Version(s):	CONNECT Edition, V8i
	Area:	Calculations

Problem

What can cause the following user notification?

"Pressure sub-network elements do not have receiving gravity nodes or outfall. The pressure elements without gravity receiving nodes or outfall are: ..."

Or:

"Pipe/channel networks must end with an outfall node. The following elements need to be connected to a valid network: ..."

Problem ID#: 67168

Solution

This can occur if there is a connectivity problem in a gravity subnetwork, such as a missing outfall or wet well at the end of the subnetwork, or if there is no downstream gravity node (manhole, transition, catch basin, outfall) at the end of a pressure subnetwork. You will want to review your model to make sure that elements are connected to an appropriate outflow node at the end of the subnetwork. Tools like Network Navigator can be used to help with this. You should also check for inactive elements or closed pipes, which can be a possible cause of disconnection if an outflow node is present.