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Old 08-27-2012, 07:17 AM   #1
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hydrogen sulfide odor

Just went to check my mom's summer home. Mobile. I checked all electricals and faucets. Nobody has been in home for 3 months.

When I turned on the shower and sink in one bathroom very strong odor of hydrogen sulfide (rotten eggs). This disappeared after a minute or so.

Is there cause for concern?



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Old 08-27-2012, 08:19 AM   #2
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I'd guess it's minerals in the water that have been cooking in the water heater for three months.
City water or well?


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Old 08-27-2012, 09:10 AM   #3
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Ran across this in State Industries manual...

HYDROGEN GAS: Hydrogen gas can be produced in a hot water
system that has not been used for a long period of time (generally
two weeks or more). Hydrogen gas is extremely flammable and
explosive. To prevent the possibility of injury under these conditions,
we recommend the hot water faucet be opened for several
minutes at the kitchen sink before any electrical appliances which
are connected to the hot water system are used (such as a dishwasher
or washing machine). If hydrogen gas is present, there will
probably be an unusual sound similar to air escaping through the
pipe as the hot water faucet is opened. There must be no smoking
or open flame near the faucet at the time it is open.

it may be the result of a bad anode rod in the water heater. Some of these can give off gas that will cause bubbles to come out of faucets. This problem is usually only found with systems on wells but can happen on city water. They can be replaced with a different material to prevent this or removed all together. Removing them completely will void the manufacturers warrantee. Also, a rotten egg smell can also be caused by the anode rod.
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Old 08-27-2012, 09:22 AM   #4
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City water.

Original heater at least 20 years old. I'm thinking before major issue better to change out the hot water heater. instead of just the anode.
At 20 years old it'sseen better days and only a matter of time before replacement.
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