Don’t Ignore the Gurgle: What Water Hammer from Closed Valves Is Trying to Tell You
https://cleaneverycorner.com/slow-draining-showers-diagnose-main-line-vs-individual-drain-problems-and-finally-silence-the-gurgles/
That soft gurgle behind a wall, in a radiator or under a sink is easy to write off as harmless plumbing noise. It isn’t