Urgent! ! ! The sound of water droplets seriously troubled family members' sleep.

This is because the plumber must be unprofessional. Reason: According to the requirements of the working manual, if the depth of the pipe at the bend joint is .9-1.1 (cm) greater than or less than the vibration frequency caused by residual cyclone (due to the different frequency, timbre and sound pressure due to the factors such as pipe length, overhead and environment). Suggestions: 1. Find the source and reinstall the pipe joint. 2. Find the source, press shockproof foam around and reinforce it. 3. Shorten overhead points.