Rotten egg odor in softened hot and cold water

Reply Tue 19 May, 2009 10:07 am
About 2 years ago, a rotten egg odor developed in our soft water - hot and cold. We changed our Rainsoft water softener to another brand and noticed the smell about 6 mos. later. We have an on demand water heater for the house and a small electric water heater under one bathroom. If we use up all the soft water (showers, laundry, etc.), the odor is barely noticeable. Most of the time, it's unbearably stinky. We've done the bleach routine a couple of times but it only lasts a few hours. Also, we have high iron well water. The water conditioning people have been out once, we've had a plumber out once. Do we need a well man or do we need to change the resin in the softener?
Fenton, MI
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Reply Wed 20 May, 2009 05:15 pm

I would sanitize the softener and install a Filox filter ahead of the softener with
a 20 micron spun poly cartridge in a clear housing with a built in bypass.

You want a Vortech tank with a Fleck 2510 SE filter valve on it.
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Reply Thu 21 May, 2009 06:32 am
Not from an expert, but since no one else has responded ...

Are you in a drought condition? It could be your well is not pulling in the water it once was or that sulfur has started to contaminate your well. It's interesting that if you use a lot of water, the odor fades only to return later. It could be you have a contaminate in the well that tends to settle and when you pull a lot of water, it temporarily runs the contaminant out.

I would allow the system to sit overnight, then flow enough to clear the pipes and test the water directly from the well and test the water from the outlet of the softner. Run a lot of water until the odor fades and repeat. Your water conditioning people should be able to tell from the results if your resin needs replacing. The second test should tell you if something is building up in your well.
Reply Thu 21 May, 2009 09:11 am
Hydrogen Sulphide (H2S) is a gas found in water.
The gas is less of a problem in a drought situation and made worse when surface conditions are wet.
Running water from the tap for extended periods of time will reduce the concentration of H2S in your H2O.
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Reply Fri 29 May, 2009 04:38 pm
what is the bleach routine? chlorinate the well?
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