Welcome! Here are the website rules, as well as some tips for using this forum.
Where is the anode rod in this heater?
One of the properties has a 2-panel Wagner Secusol solar hot water drainback system, and on the side of the tank (Intertek SGL-350) it says that part of the annual service is to inspect (and if needed replace) the anode rod.
I pulled off the top cover, and found this. Has anyone seen a tank like this? Where's the anode rod? Do I pull off that big metal cover? I wonder what would be needed to re-seal it...
I have not been able to find any service manuals for the system at all, and the company that installed it years ago keeps saying they will call me, but don't.