The bathroom sink overflow is a plumbing feature that helps divert a small amount of water while allowing air into the drain when the sink is filled with water. This air helps the water in the sink drain faster and improve draining.
In this respect it is important to remember that plumbing works on gravity with water running down and air moving upward. The two cannot work separately in pipes and need to work simultaneously. In simple terms, if air is not escaping upwards through the pipes water will not travel downwards causing problems like foul air coming through the sink overflow.
Reasons for the Bad Smell
If there is a noticeable foul odor emanating from the overflow pipe in the sink, it could be due to an accumulation of bacteria or a layer of gunk. Or occasional water along with environmental dust can collect inside the overflow opening. This accumulation can impact the flow of both air and water in the long run. With the bathroom drain clogged, it becomes a real possibility that the sink overflow will cause a stink when used.
To ensure that the overflow can serve its function properly, it needs to stay clean and clear. But since the approach to the sink overflow is limited, it can be tough to maintain cleanliness.
Some Ways To Clean The Bathroom Sink Overflow:
One way to prevent bathroom sink overflow leaking is to keep it clean by using a long zip tie. This is because plastic zip ties are easy to bend around the curve of the sink while also being rigid enough to knock loose any buildup. To use a zip tie, place the pointy end of the zip tie into the overflow opening and gradually position it down as far as possible. Moving the zip tie up and down or side to side helps displace any buildup out of the way. When done, run the sink to check if it is draining better.
Another way to address the sink overflow is to use a rubber hose to blow air through. This technique involves filling the sink up with water slightly higher than the overflow opening. Start by letting some of the water run down the overflow opening and put one end of the rubber hose against the overflow opening. Blow several puffs of air through the other end of the hose and then drain the sink. Blow air again which should waft through the hose without any resistance. Repeat as needed.
While the overflow can become quite dirty with frequent use, installing a bathroom sink overflow drain cover over the opening can help give the sink a finished look while hiding the overflow hole but without blocking it. Overflow covers are also easy to remove when cleaning the overflow is required. The same can then be placed back in position to keep up the aesthetics of the sink.
Should the bathroom sink overflow present serious smell issues, get in touch with experts like Tidal Wave Response in Georgia to resolve the issue.