The node connection rules are based on the link type allowed between each node output and input. When you draw links between outputs and inputs, the UD plugin will prevent you from configuring the links to join incompatible inputs and outputs together.

In Node Model detailed descriptions, each node model input and output has a link type listed. The table below summarises these connection rules in one place.

To use this table, look up the originating node in the left-most column, then the output you want to connect (the destination node).

Example: from a roof node, you can connect the runoff output to a buffer, but not the runoff to tank output.

This table shows the allowed connections between a source node, and a destination node. The Destination node column specifies which output of the source node can connect to the nodes below it. If a node is not listed in the Destination Node column, the connection is not permitted. For example, the Roof node's Runoff to Tank output can connect to a Tank node's Rainwater / Stormwater Tank inflow, but not an Average Water Use node's Rainwater / Stormwater inflow.

Origin Node Name	Output	Destination Node - destination input type(s)
Roof	Runoff to Rank	Tank - Rainwater / Stormwater **
Roof	Bypass Runoff	Tank - Rainwater / Stormwater **
Tank	Spill	Connection type not currently implemented
	Detention Outflow	Connection type not currently implemented
	Demand	Average Water use - Mains, Rainwater Tank, Alt. Supply 1, Alt. Supply 2 Behavioural Water use - Mains, Rainwater Tank, Alt. Supply 1, Alt. Supply 2
Average Water use Behavioural Water use	Greywater	Tank - Rainwater / Stormwater **
	Blackwater	Tank - Rainwater / Stormwater **
	Irrigation/Other	Tank - Rainwater / Stormwater **

** Recycled Water is also available in the UI, but is not currently connected for the Tank node

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