The noise is similar as that in the below video. Would this be water hammer? https://www.youtube.com/shared?ci=Vwo5xjZ4FNA

Similar to the first poster, I've also noticed a loud ongoing noise from my water pipes when the unit(s) above me run water (the noise is an ongoing hum/shriek - not just the sound of water flowing through pipes). Is this normal? Does anyone else hear similar noises when the units above have...