How long does it take pee trap to dry out?

A pee trap can dry out in as little as a few weeks to a couple of months, depending on factors like humidity, temperature, and usage frequency. If a sink or drain is rarely used, the water in the trap can evaporate, allowing sewer gases to escape into the home. Regular use or periodic flushing with water can help prevent this from happening. To maintain functionality, it's advisable to run water through infrequently used drains regularly.