a drain simply because a social media post recommends it.
How Long Can a Sink P-Trap Go Without Being Used?
There isn’t one fixed period that applies to every home.
The water in a P-trap can evaporate gradually, and the rate depends on factors such as temperature, humidity, airflow, trap design, and how frequently water enters the drain.
In many ordinary homes, the trap will remain effective during a vacation lasting several days. However, a rarely used drain in a hot, dry environment may lose its water seal sooner than
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