Pipe Noise or Leak
There is a noise under my kitchen sink when I pour boiling water down the drain that resembles a drip. I have been under the sink a dozen times looking for a leak and there is none. The noise is making me crazy. This house was newly constructed 6 years ago by a very reputable builder. Can anyone give me some ideas of what the noise is and how to solve it? I will be extremely grateful for any help. Betsy.