Don't Dismiss the Gurgle: What Water Hammer from Closed Valves Really Reveals

https://www.canberratimes.com.au/story/9118615/top-plumbing-warning-signs-you-shouldnt-ignore/

That little gurgle in the wall when you shut a faucet seems harmless. You tell yourself it's just old pipes settling. You ignore it until one day a banging wakes you at 2 a.m. or a fitting cracks and water pours out. Water hammer is more than noise