My house was built in 1929 and has gone through many rounds of plumbing/electrical upgrades over the years. I am replacing the galvanized pipes with PEX and I'm confident that I have planned appropriately for the plumbing part but I'd appreciate help with the electrical part.
Existing situation: the galvanized is bonded to the stub of original water main into the house because the water main in was replaced with CPVC at some point. (I've marked connection between the galvanized and the stub in red in the photo). The 200amp service panel is also bonded to the galvanized pipe as well as a grounding electrode (see photos below). Both wires seem undersized for a 200 amp panel and based on the age of the wire to the galvanized pipes is probably a remnant of the old service panel.
My question: when I install the PEX do I need to run a new wire from the service panel to the old water main stub to create a secondary path to ground? Or was bonding the galvanized pipes to the service panel a secondary path to ground in case the pipes became energized? (I apologize if I am not using the right terminology, I'm trying my best)