April 19, 2023

Water Heater: Why does my hot water smell like rotten eggs?

Certain water conditions cause a reaction between a water heater's anode rod and supply water, causing hydrogen sulfide gas to dissolve in the tank water. The hydrogen sulfide gas gives the water a rotten-egg smell. Installing a less-reactive aluminum alloy anode rod and chlorinating the water supply system eliminates the rotten-egg smell in hot water.

water heater

THESE REPAIRS MAY HELP SOLVE YOUR WATER HEATER PROBLEM

JC-WH-Replace-the-anode-rod

Replace the water heater anode rod

The anode rod protects the tank from corrosion. A chemical reaction between the supply water and the anode rod can produce hydrogen sulfide gas and cause the hot water to smell like rotten eggs in some conditions. Replace the anode rod with a less-reactive zinc-aluminum anode rod to combat the rotten-egg smell.

Water heater anode rod

Find the required part specific to your product.

RG-WH-Replace-Electric-Water-Heater-Anode-Rod-Intro-Image
July 01, 2015

How to replace an electric water heater anode rod

Does your hot water smell like rotten eggs? This repair guide and video show how to fix the smell by replacing the water heater anode rod with a zinc-aluminum anode rod.

Repair difficulty
Time required
 15 minutes or less

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Articles and videos common to all water heaters

Use the advice and tips in these articles and videos to get the most out of your water heater.

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