As a followup on this topic: https://forum.dynamobim.com/t/select-all-pipe-networks-and-merge-into-a-new-pipe-network/
I took a look into the PressurePipeNetworks as well. It works a little different and I still don’t know how to remove parts from a original network but this is (I think) a move forward… Feel free to improve and share back.
Mind you, this is not the solution yet!
MergePressurePipeNetworks.dyn (11.8 KB)