Water Smell

Had a bathroom sink replaced with a pedestal sink. Only new components added were the two feed lines and the faucets. Started getting a strong sulfur smell coming from both the hot and cold water; never had the smell before putting in the new sink--none of the other sinks, shower, tub or other water sources in the house have this smell. Changed out the feed lines from stainless steel to plastic--smell still there. It's a puzzle-- the only thing left that's new are the faucets. Has anyone run across something similar to this? Any suggestions? MLD
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