Common Causes and How to Fix Water Hammer
You know that irritating, loud, banging and vibrating noise that you hear when you turn off the tap? It’s what we call a water hammer.
Water hammer occurs when a valve is suddenly turned off which causes the pressure from the gushing water to suddenly stop. This high pressure then causes hydraulic shock waves that reverberate throughout the pipes thereby causing those loud vibrating noise that you hear.
We would need to differentiate though if the sound that you hear is from a water hammer or from trapped air inside the pipes. One simple way to do this is to determine when you hear the sound. If you hear the sound after you have turned on the tap, then that is trapped air inside the pipes. But if you hear the sound after you have turned off the valve, then definitely that is a water hammer.