What to Do About That Frightening Banging Sound From Behind the Walls
Strange sounds coming from behind the walls can be pretty scary. The house doesn’t have to be old and creaky to experience sounds like this. If a homeowner hears banging from inside the walls when the plumbing is in use, it’s not a ghost trying to communicate. It’s a water hammer. Read on to learn more about what a water hammer is, the risks, and how plumbers fix it.
Water Hammer: Definition and Causes
Water hammer is the non-technical term for a form of hydraulic shock (or transient flow) that happens within a plumbing system. It’s easy to tell when a water hammer happens because it causes a loud banging sound — like a hammer. But the critical thing for homeowners to remember is that water hammer only occurs when some part of the plumbing system is in use.
The water hammer makes a banging noise by rattling the pipe in the wall when the water valve shuts off. This could happen after the toilet is done filling, when the washing machine finishes putting water into the tub, or when someone in the house shuts off the shower. When a valve closes and the water has nowhere to go, it can cause the pipe to rattle. But water hammer shouldn’t be a regular occurrence, and it carries risks that homeowners need to be aware of so they can take quick action to remedy the situation.
Water Hammer Risks
Water hammer, or hydraulic shock, occurs when water flow in a plumbing system is suddenly stopped or redirected. This sudden change in momentum causes a pressure surge that can result in various issues and potential risks. One of the most significant risks of water hammers is damage to pipes and fittings. The powerful pressure surge can cause lines to shake, rattle, leak, or even burst. This can result in costly repairs, water damage, or flooding within a building.
A water hammer can also damage appliances connected to a plumbing system, such as washing machines or dishwashers. The sudden pressure surge can cause these appliances to vibrate excessively, potentially causing them to malfunction or break down. So, water hammers can cause serious issues that reach far beyond noisy pipes, and if left unaddressed, they can cause leaks, damage to pipes and the plumbing system, and possible water damage.
How to Fix Water Hammer
The best ways to fix the water hammer depend on the cause, so leaving it to the professionals is essential. Sometimes, draining the plumbing system can help fix the sound temporarily, but any underlying causes will likely remain. When a professional plumber comes to fix it, they may install a water hammer arrestor to resolve the issue permanently.
They will also check to ensure the water pressure isn’t too high, which can often cause banging pipes. A water hammer can also be helped by properly securing the line inside the wall. Another solution may be air chambers near the valve that should act as cushions to prevent water from slamming hard into the newly closed valve. It is vital to have a plumber address the water hammer before it becomes a much bigger issue.
About Green Hills Plumbing
Green Hills Plumbing is a locally owned and operated company serving Nashville and the surrounding areas. They provide upfront pricing, 24/7 emergency service, and a 100% satisfaction guarantee. Call them today for plumbing services in Nashville, TN.
