Egg smell from hot water - Rheem 40 GAL ELEC TALL Water Heater 6YR SC 82VH402

It is unlikely to be the hot water heater causing the smell, it is more likely the input (the well water) having excess sulfur, bacteria and/or organic material

Because it sits in the tank longer, the smell accumulates. If it is a bacterial source, the hot water tank may be a breeding ground for anerobic bacteria. Draining and doing a disinfect with Hydrogen Peroxide (H2O2) is the easiest and safest step

http://www.waterheaterrescue.com/Troubleshooting/stinky-water-in-hot-water-heaters.html

https://www.stevejenkins.com/blog/2015/02/fix-rotten-egg-smell-in-your-water/

Some water softeners you can increase the back wash time on the unit to clear out a smell or bad taste , rotten egg smell can be sulfur. You may need a well flush but seek a well company on that for there advice as its not cheap .

first replace your anode rod if that doesn't work the problem is in your water look at water treatment systems

Water pressure is blowing everyting loose with new heater,give your system a good flush,it will work it self out. RichieRich

You'll have to disconnect the water lines from the top to pull the rod up out from within the tank. If you don't have enough clearance above the tank, you'll have to drain the tank, remove the venting and tilt it or lay it down to remove it. The sacrificial rods usually go bad prematurely on well water systems with hard water and causes a sulfur stench in your water. Here's a quick test to try before you do this: Go to the nearest faucet to the water heater and fill a glass full of cold water and another glass full of hot water and smell them. If the hot water is the only glass that smells like rotten eggs, it's most likely coming from your water heater due to your anode rod. Douglas

Hey check out this link that I found on this matter I hope will help you with this.
http://homerepair.about.com/od/plumbingrepair/ss/trblsht_hwh_5.htm

is it a new well.......it may go away after a while...its sulfer....sometimes when you drill well too deep you get sulpher water......

boiler type? Combi,standard,if your boiler is a combi the non return valve onto your heating line may be defective thus hot water slippng back through cold line best of luck

turn the power off and flush it out by letting the tap run for an hour or so
i think it could have lime scale in it or the element is about to blow if its the type that you can get the top off look inside it you may see the fult even kettle cleaner may be needed to clean it out, but dont go drinking that water???

its the mag rod in water heater-if your not using alot of hot water,and water is sitting in heater it will smell like rotten eggs-u can remove mag rod from water heater.it is in top of heater-