Simple Junctions are typically used to connect two open connections, such as the Rectangular Channel, Trapezoidal Channel and Triangular Channel connection types, where there is a change in the dimensions or slope of the channel or where an open connections meets a Pipe Connection connection. The Simple Junction may also be used for pipe joins without a manhole or for joining other Connection types.
Special rules apply to Simple Junctions during analysis. The elevations are inferred from joining connections where these exist, where Simple Junctions are used to join Connections without elevations flow is assumed to pass straight through unless restricted by an Outlet.