Originally Posted by 10brink
I plugged in my new Atwood water heater today to discover a very strong rotten egg smell... Water has been sitting in the heater tank for about 2 months or so before running it today.... Any ideas?
there is NO anode rod to fiddle with (in a NEW atwood) and no need for one either...
YOU have correctly id'd the issue which is a concentration
of sulfur from whatever was the water source, TWO months ago.
this allows for some bacteria to grow (even in hot water) that reduce sulfur to the odor'd jour...
basically you need to pull the plug and flush via the plug opening, LOTS of flushing.
a dose of acetic acid or other neutralizing agent will help too.
then replace the plug and sanitize the water system
consider DRAINING the freshwater tank now too, since it may still have some of this old water and needs to be sanitized anyway.
in the future consider a good filter for INCOMING water that removes strange minerals...
oh, and any questionable water source should not be allowed to remain IN the tank for a long time.
lots of INFO on this issue on the web here is a place to start, but google 'sulfur reducing bacteria'
for more info...