A residential 17 year old electric water heater is working well in Florida. Maintenance is overdue. I plan to inspect / replace:
- sacrificial anode (expected to replace)
- heating element (expected to replace)
- flush the tank
With regard to purchasing a sacrificial anode, there seems to be at least two features one must decide:
- Metal type: magnesium, aluminum or aluminum/zinc alloy.
How does one decide on proper metal to use and the length of the anode? As it understand it, the threading is standardized.
There is plenty of space above the tank for a long rod, so a segmented anode is unnecessary.