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Old 02-04-2009, 06:03 AM   #1
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I am experiencing a strange odor problems with my water in the MH. It seems to be mostly the hot water which has developed a sicky sweet smell. (My wife describes it as a dead mouse smell) I have performed the bleach solution flush with no improvement. A friend had a somewhat similar problem and fixed it by filling the hot water heater with vinegar and heating it overnight. I tried that and it somewhat alleviated the problem. I winterized the coach with pink stuff and after coming south, a month later the problem is back again.
I would sure appreciate your thoughts on this. The water heater is the kind with an anode on the drain plug. Could that be causing some of the problem. It takes 8 gallons of vinegar to cook and I don't care to do that every 2 months.
Thanks for any advice - Darrel

2007 3912 KSDP w/350HP ISL Cummins
2003 Grand Cherokee toad w/M&G Brake
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Old 02-04-2009, 07:25 AM   #2
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Anode rods often cause strange odor in the water as they wear down. Try replacing it. Another possibility, I noted a strange odor once after de-winterizing and eventually decided I failed to completely flush the pink antifreeze out. My theory was that the residue in the system reacted with the anode rod.

Paul (KE5LXU) ...was fulltimin', now parttimin'
'03 Winnebago UA 40e / '05 Honda Odyssey toad
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Old 02-04-2009, 11:35 AM   #3
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The usual small from a water heater is rotten eggs (hydrogen sulfide), caused by a bacteria that can thrive in hot water in dark places. A 4-6 hour bleach solution will cure that, but you also need to sanitize the hot water lines or it will come right back.

You don't need pure vinegar for a tank soak - 10- 20% solution should be plenty.

I'd replace the anode too, "just in case".

If none of those do it, I'm fresh out of ideas.
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
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Old 02-04-2009, 06:05 PM   #4
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Thank for your thoughts. I love this forum.
I would know Hydrogen Sulfide smell from Chem 101 and this is something different. I can't recall now if I might have bypassed the hot water heater when I used bleach on the system. At the time I was thinking fresh water supply tank. I'me going to do that next. Also the old Anode is history.

Thanks again and have a nice day - Darrel
2007 3912 KSDP w/350HP ISL Cummins
2003 Grand Cherokee toad w/M&G Brake
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Old 02-06-2009, 10:23 AM   #5
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Just read an article in Feb's FMCA magazine about the same problem. The lengthy reply (almost a full page) went into a detailed "how to get rid of the smell". The article is titled "Fresh Water Chlorination".
Richard and Mary Lou
2007 HR Scepter, 42PLQ
Supply Corps, USN Retired
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