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Country Discussion Topics
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Sewer gas causing corrosion on circuit boards copper pipes
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kane ken    Posted 03-06-2002 at 00:25:46       [Reply]  [No Email]
I talked the other day to a lady who moved into a house with a Hydrogen sulfide stench to it during certain times of the year. It is so strong that it blackened the copper pipes and has discolored a brand new brass water meter as well as the breaker panel buss boards. Smoke & dye tests and a variety of health people have yet to determine the source. Anyone out there experience anything similar? Someone told me the H2s reacts with water and creates a mild sulfuric acid and that is what is corroding the outer pipes...


Red Dave    Posted 03-06-2002 at 11:49:04       [Reply]  [No Email]
Just a little info from my NIOSH Chemical book.
Hydrogen Sulfide (H2S) also known as Hydrosulfuric Acid and Sewer Gas. Colorless gas with a strong odor of rotten eggs.
OSHA exposure limit of 10 parts per million over an 8 hour workday, that's a concentration of 0.001%. Imediately dangerous to life and health at 300 PPM. It also is flammable and even explosive at concentrations as low as 4%.
If I remember correctly from some classes I took, most people don't notice the odor until it gets to around 20 or 30 PPM. That means if you can smell it, you are already over the limit for long term exposure. It is bad stuff, not to be fooled around with.
So, yes it will corrode metals. It will also kill you if you get a good enough dose of it.
Could she have a sink trap that dried out? Is the floor drain in the basement connected to the sewer system? This may sound crazy, but does she have any wet cell batteries around? We had a case at work where a battery on an uninteruptible power supply for a computer leaked. It had that same rotten egg/sulpher smell.
Sorry for the long reply, hope it helps some.


Gene    Posted 01-01-2003 at 15:54:36       [Reply]  [Send Email]
For the past 10 years we had cracked cast iron drain pipes in the walls that were emiting gasses into the building.We finally figured it out and had the pipes repaired.We also had trouble with our a/c unit springing leakes and loosing freon,finally we had to replace the unit there were so many holes in it.Could these gases have caused this.


Okie-Dokie    Posted 03-06-2002 at 04:43:28       [Reply]  [Send Email]
Got to have an exhaust with a hole in it or the pipe is smashed togather some how. Get it fixed pronto! This is a potentially deadly situation.


KANE KEN    Posted 03-06-2002 at 17:51:56       [Reply]  [No Email]
Just got back from the house residents call "the stinky house". It is the most f*'d up scene. In a nutshell my gas detector pegged the sump pump and the newly installed ejector sump as the source. the new owners replaced the sewer line that was cracked 6 months ago. city reports indicate neighbor complaints since 1997. The sump takes ground water that passes thru organic sludge and goes to/from the drain tile and dumps it into the sump pit. Years of a sewer line leak, close to the house, and a high water table causes the gass to emit via the cracked sump basins and drain tile into the house...will be reccommending they put in immediately fresh air returns, perhaps drain tile suction and possibly sump pit replacement. the copper looked like it was in a fire. corrosion even got into the wire nuts. the burner tray. I hung copper test plates every where in the house. will be hanging ph stips to see what is in the air.. 4 kids in the house. 1 kid has ashthma.......




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