"Doug Warner" wrote in message
...
"Old_boat" wrote:

I installed a new bathroom vanity and sink. Ever since, whenever you run
HOT water in the sink, you get a strong odor of sewer gas. I have taken it
apart several times, cleaned it, ran bleach water down the drain and
overflow, checked to make sure the drain pipes were correct, etc. Whatever
I
do, the smell returns in a couple days. Any one have any Ideas what I can
try next?



A test: Run the first hot water into a bowl, not letting it get near
the drain. If it still smells, it's the water. (I get occasional
sulfer smell in the hot water..)

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I took it apart again last night, this time I took off the tail piece of the
sink drain also. I found that the space between the top of the sink drain
and the bottom of the sink drain where the overflow goes into the tailpiece
just full of black gunk. Now the question is, why is this particular sink
accumulating this stuff in that area. I cleaned it all out and now it does
not smell at all, but I bet it will return in a short period of time. Could
it be the faucet drain is not designed properly? This is a cast sink that is
made of all one piece of a resin type material that resembles granite?