The Real Deal on Covering Your Sink Before Vacation

However, if you leave a drain unused for a sufficient amount of time, the water will eventually evaporate, eliminating the protective barrier created by the P-trap. At this point, you may begin to notice a bad odor or worse yet, unwanted critters may begin to enter your home. Drainodor blocker

Therefore, the reasoning behind the viral hack is valid. If you plan to leave your home for a significant period of time, you do not want your P-traps to dry out.

How Often Does This Happen?
You don’t have to worry about evaporation occurring in the event of a weekend getaway or even a short business trip. In general, P-traps remain sealed for at least a couple of weeks, possibly even longer. However, in extreme circumstances, P-traps can dry up faster.Vacation planning guide