A connectivity trace is a network review tool in epanet-js used to verify a network is fully interconnected. Its purpose is to check the network's topology and identify all separate, unconnected systems, which are referred to as subnetworks.
In a fully connected water distribution system, the trace should ideally result in a single subnetwork. However, multiple subnetworks can be valid if the model intentionally contains separate, distinct systems.
The tool will generate a list of all subnetworks, providing a count of how many distinct systems exist as well as their size (by quantity of pipes found in the system).
You can select a subnetwork from the list and zoom to its location on the map to give a proper assessment of the situation.
With this tool you will make sure that every identified subnetwork has at least one source of supply (e.g., a reservoir, tank, or fixed head). Any subnetwork without a source will cause the simulation to fail.