Overflow drain at the top of a sink - Ari Triyanto/Shutterstock If you are not a plumber or sink installation expert, there may be some components of your bathroom sink you have yet to learn about.
Q You forgot something when you were doing your plumbing work in a recent column. There is one more thing that can cause vanity sink odor -- the overflow drain. I'm an ex-plumber, and when I moved to ...
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