>the magnesium sacrificial anode cannot be removed, too close to the ceiling
I was contemplating what to do about that with my water heater, but I think maybe the procedure is that you cut it up as it comes out, if it is one long piece, and there are replacements that are segmented so you can get them back in with limited clearance.
It's so close for me, I cannot get the key in to open the lock to the anode. Otherwise, if one has some access space, segmented is a good solution. or, alternatively, an anode that is part of the heating element assembly, if that is at the bottom / accessible.
Some handy individuals have modified their existing assemblies, but I don't have the time nor the tools, and it's not cost-effective to mess around in my case, as a replacement for my electrical unit will be under $300, dealer demo unit, with own installation. Just have to snag one on sale.
I was contemplating what to do about that with my water heater, but I think maybe the procedure is that you cut it up as it comes out, if it is one long piece, and there are replacements that are segmented so you can get them back in with limited clearance.
https://images.app.goo.gl/KtLKGEG3h8rfT93k6