Sulphur Smell from Water System
We have a 10-year old 5th-wheel. About 4 years ago, the hot water smelled like sulphur. I replaced the anode with an aluminum/zinc anode and filled the water heater with undiluted vinegar. We were good to go for 4 years. At the beginning of this season, I sanitized the water system with bleach as usual. About 1 week into our summer travels, the hot water sulphur smell was present. I drained and then filled the water heater with a solution of hydrogen peroxide.
The smell was gone, but only for about 10 days, so I drained the water heater and filled it with undiluted vinegar. After 6 hours, I drained the hot water tank. Of course, the smell was gone.
About 10 days later, the smell was back, but this time we noticed it was also present in the cold water too. So I sanitized the entire system with bleach (1.5 cups in 90 gallons), letting it sit for about 8 hours.
Again, the smell went away, but came back after about 10 days. I treated the entire system again with bleach, but doubled the strength to 3 cups in 90 gallons and let it sit for 24 hours.
Guess what? About 10 days later, the hot water is starting to smell of sulphur again.
Any ideas regarding what will get rid of the smell and keep it gone?
