"SteveC" wrote in message
...
I just drained some hot water off it and it was rotten and full of
rust/dirt particles. I drained off about 10 gallons. I wonder if that is
enough. I will try it again later to see if I get some more come out.

Try it a few more times. Flush it as long as you get particles, then do it
on a regular basis, about once a month, to keep it clean.