|
Unregistered
Join Date: Aug 2000
Location: a wretched hive of scum and villainy
Posts: 55,652
|
Water heaters have a zinc annode that prevents the rest of the unit from rusting out. the annode gets eaten away instead. It's usually screrwed into the top of the tank.
As long as some of it is still there the tank is protected but after 20 years it's probbably gone.
You COULD just replace the annode and get more life out of it if you wanted, they're reasonably cheap on evil-bay, round $30 to $40 IIRC.
|