Originally Posted by plmulhern
When I use the bathroom sink I get a strong sulfur smell. I don't get it with the water in the toilet or the kitchen sink. I am assuming I have an issue with the water trap in the drain if it has one or the grey water tank. Any ideas on how to eliminate the smell?
Your profile says "Currently looking…" so we don't know what kind of Airstream B-van you've got. One can presume it's an Interstate since that's the most common here on the Forums, but it also makes a difference what model year, and we don't know that, either.
Newer Interstates have Hepvo valves instead of P-traps. They are basically check valves of a special type; the Brits call them "joker valves." They do not retain water, but they do not usually
allow odors to pass, either.
Try this… put the sink stopper in. This will block any odors coming up from the drain. Then run some hot
water in the sink and see if you still get the odor.
Then drain the hot water, and try the same experiment with cold
1 - If you don't get the odor at all with the sink stoppered, then you know that it's from the drain.
2 - If you get the odor with the drain plug in and when you run both hot and cold water, you know the odor source is your fresh water tank.
3 - If you only get the odor when you run the hot water, you know the source is your water heater.
Once you've narrowed down the source, it will be easier to figure out what to do about it.