I’ve read previous posts, regarding noise in water lines but my situation confuses me. The noise occurs with irregularity, even in the late evening/early morning hours when no one’s using running or flushing water. I seem to have isolated the noise to be coming from the vicinity of the hot water heater/humidifier area which are located in the basement. Another bizarre thing that happens when the noise occurs . . . if we’re watching TV, there’s static lines that show up on the screen, sort of like when a mixer is turned on. The house is 12 years old and we have lived in it for 2 years, whereas this noise just started 2 months ago. Can anyone help? Thanks!