Good Stuff, Stuff. I have a stutter.
I have seen the manufacture requirements in the Water Heater Service Manuals.
Electric and gas water heaters should not be treated the same.
Filament shorts and the like make bonding Electric heaters very important.
With PVC in use, the electrical bonding of the whole system may not happen.
Bonding and Grounding are two different things.
If not done properly both can kill you.
Are we confused yet ?