The reason I mentioned to bypass the HW tank is that when I add deluted bleach to my water bay for cleaning fittings and quick release fittings the bleach will turn the brass fittings green with envy.
WELL I will stand corrected about putting bleach solution thru water heater and let stand.
That is what you would do if you had a smelly rotten egg odor, or "sulphur water" its not harmful, only unpleasant to smell. The solution to eliminate is a heavily chlorination of the water system. Add about six (6) ounces of liquid bleach to each 10 gallons in the water tank. Than run thru system opening each faucet one at a time until you smell the chlorine. Let the RV set for a few days, than flush the system.
So you should feed the chlorine into water heater if you have had the sulphur problem or just want to completely sanitize your water system.
You can remove the anode rod and place a plastic plug. I replace the rod every spring its in bad shape in the fall.
"ecker" is correct no problem bleaching out your HW tank.