Odour from bathroom tap, not the drain!

[jabartle]

An odour only 'seems' to appear when we turn our bathroom sink tap is turned on. This rotten egg odour lasts for about a minute and then clears. This odour is not found in any other fixture in the entire house, including the bathtub next to the sink. No odour is present in the drain or otherwise.
We had our entire bathroom gutted and renovated, with new copper piping in the bathroom area only. There is some galvanized steel pipes as well. Anybody have any suggestions? I'm stumped as to why it's in the water line and not the drain (or so it appears). Thanks.

 

[Prashster]

Search this forum for 'overflow tube'.

This happened to me. The overflow tube can breed 'stuff' if it doesn't drain properly.

My cause: My sink drain was installed with too much caulk; clogged the side holes that accept the overflow water.
My solution: Remove popup. Use a coat hanger to unseal the side holes in the drain. Flush overflow with bleach.
My result: It worked.

I'd also try to scour the inside of the overflow as deeply as possible with long, twisted pairs of pipecleaners.

If your water only 'smells bad' from one sink, it's unlikely it's a water supply issue.

 

[Sponsor]

 

[Kordts]

Remove the aerator and see what happens.

 

[Coach606]

me too...

It's interesting because I seem to have developed the same problem in one sink. In mine, I've noticed some rust coloring around the pop up drain, too. So I suspect it is the culprit. I think it all started after we had a clog that backed up the sink.

I'll try your suggestions and report back.

 

[Lakee911]

I had a problem like this before too. I had installed that pop up drain so the pin goes through the hole and its locked into place. All kinds of gunk got "all up in 'aire" and was some foul stuff. Undid the popup, scrubbed the sink and the popup w/ some bleach and reinstalled it w/o the pin in the hole. Good as new