How to fix overflow drain in sink?
How to fix overflow drain in sink? Stick the funnel in the overflow hole in your sink.Pour the baking soda down the funnel.Next, slowly pour the vinegar down the funnel. Let this sit for about 15 minutes so the baking soda and vinegar can work their deodorizing magic.Carefully flush the sink with the boiling water. How does bathroom sink overflow work? The sink overflow helps the basin drain faster by allowing air into the drain pipe via the overflow channel. When there's enough water in the basin to completely cover the drain opening, the drain can't get air through the...