Doing my 2nd annual water heater maintenance with the objective to flush out the entire electric tank. I expected a gradual reduction of sediment from the start to the end (completely empty tank).
Instead it was about 8 oz (~250ml) worth of rusty-colored sediment and then the water was completely clear. For additional context, last year's maintenance involved completely emptying the water heater and changing the anode rod.
I don't mean to overthink this situation but I don't want to assume everything is fine. Which leads me to the question:
When flushing a water heater, is the objective to completely clean out all of the water in the tank or just enough to remove sediment?
If it's the latter, then I assume my particular tank may not require annual flushes. Please let me know what you all think.