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Old 08-11-2018, 05:09 PM   #21
Senior Member
Join Date: May 2014
Location: IL
Posts: 1,090
Hi fobagbob,

I'm 100 percent certain this is not a water-based smell. We had that at one time -- that is, the sulphur smell -- so I would recognize it again.

As soon as I dump, the smell permeates the entire living space. On initial sniff it always hits us as a black tank smell, but I accept the proposition the it could be funky gray. To that end, I have been doing the GEO treatment in all three tanks, and adding a commercial anti-odor product as well (cant recall the brand at the moment).

But thanks for helping me think this through.

Rich Phillips
Rich Phillips
2019 K-2500 Duramax Crew Cab
2014 Silverback 33RL
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Old 08-12-2018, 10:31 AM   #22
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Join Date: Jan 2015
Posts: 17
I should have mentioned that all the under sink valves are brand new. In addition, i add chemcial to each tank after they are emptied and flush. I just finished washing dishes and I have the odor again. I actually open the cabinet under the sink and could not smell any odor. It does appear to becoming from the ac vents. Ill keep trying to find out whats going on. I think it may be the heat here. consistently over 105
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Old 08-13-2018, 01:34 PM   #23
Denver To Yuma In 90 Days
Join Date: Mar 2018
Location: Yuma, Arizona
Posts: 3,882
Also try cleaning out the p-traps under the sinks...

They are notorious for build up and stink!
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Old 08-14-2018, 09:43 PM   #24
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Join Date: Dec 2010
Location: East Berlin
Posts: 732
Are you absolutely sure your roof vents are open. Have you run water down the vents, just to make sure they are clear?
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Old 11-13-2018, 08:45 AM   #25
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Join Date: Nov 2018
Posts: 7
Hot water heater

We came back from to our cottage after it sat for five months and turned on the hot water in the kitchen and it smelled like rotten eggs. I thought it was coming from the kitchen holding tank. Nope. It was coming from the hot water heater. The cause is bacteria interacting with the metals in the anode creating the token smell. I drained and refilled hot water heater and it went away. I found the solution be searching on line.
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Old 11-29-2018, 09:38 PM   #26
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Join Date: Feb 2018
Posts: 12
We had the same issue when we turned the hot water faucet on. Didnít have the problem with cold water. We turned off the water supply and dumped out the water and put about 2 cups of hydrogen peroxide in it then hooked up the water supply and turned it back on to get into the hot water heater and let it set for about a couple of hours. Now no smell, yea!
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