Since the System Classification will normally be greyed out, switching directly is not possible. You can try one of the two possible ways to switch to the correct system classification:
Method 1
a. Disconnect the pipe from the pipe fitting which belongs to a different system
b. and then reconnect by stretching the pipe back to the fitting (either we can use trim method for re connection).
Method 2
a. The second method is, press the “Tab” key and select the fitting, this makes the system highlighted in the System Browser (System Browser opens from View tab -> User Interface -> System Browser or by pressing keyboard shortcut “F9”).
b. Once selected, press the Delete key which basically deletes the System. Then reconnect the pipes back to the fitting.
