How Do I Stop My Pipes from Knocking/Banging

How Do I Stop My Pipes from Knocking/Banging

Nothing disrupts a quiet evening at home quite like the sudden, alarming sound of banging pipes. This common plumbing issue, known formally as ‘water hammer,’ can transform your peaceful abode into a cacophonous nightmare. Ignoring these noises, however, is not advised. Left untreated, the persistent knocking may not only disrupt your tranquility but can also lead to more serious problems, such as loosened fittings, pipe damage, and even leaks.

Understanding why your pipes are making these sounds and learning how to rectify the disturbances is essential. This guide will walk you through the common causes of pipe knocking and offer practical, step-by-step solutions to silence your home’s plumbing. In the end, you’ll be better equipped to handle these issues, ensuring a quiet and serene home environment.

Understanding and Analyzing Pipe Noises

To understand banging pipes, let’s explore the sounds they make.

high water pressure

Rhythmic knocking sound: This might indicate excessive pressure in the pipes. When water is turned off abruptly, the high-pressure surge creates vibrations that cause the pipes to bang against walls or other objects.

Loud banging sound: This noise can be alarming and may occur when you turn on a faucet or flush a toilet. It’s usually caused by air trapped inside the pipe, creating a vacuum that results in loud banging noises.

Constant banging sound: This is typically a result of loose or damaged pipes. As water flows through the pipes, it creates vibrations and causes them to bang against nearby objects.

Early detection of these different noises can help identify specific issues within your plumbing system. If you notice any of these sounds, it’s time to call a professional plumber for help.

6 Common Causes of Water Pipes Banging Noise

6 common causes of pipes banging noise
  1. Water Hammer: This phenomenon occurs when the water’s flow in the pipe is suddenly shut off, creating a shockwave. This shockwave results in the banging sound you hear, often when a faucet is abruptly turned off or a dishwasher cycle ends.
  2. Heating Systems: As your home’s heating system operates, hot water flowing through the cold pipes causes them to expand and contract. This process can lead to banging or knocking sounds, particularly in older heating systems.
  3. High Water Pressure: If your home’s water pressure is too high, it can lead to excessive strain on your pipes and fixtures. The resulting vibrations can cause the pipes to knock against each other or against the walls, leading to persistent noises.
  4. Loose or Improperly Secured Pipes: If your pipes are not securely fastened, they can move around when water flows through them. This movement can lead to knocking sounds as the pipes bump into each other or the walls.
  5. Construction and Renovations: Pipe noises can also be a side effect of recent construction or renovations in your home. If your pipes were not properly re-secured after a remodeling project, they could be more susceptible to movement and subsequent knocking.
  6. Age and Wear: Over time, pipes suffer from wear and tear, and older pipes are more likely to bang or knock. Age-related issues could include calcification, corrosion, and other forms of damage.

Impact on Water Pipes and Plumbing Systems

lose plumbing pipes water leak

The consequences of persistent pipe banging can significantly compromise the integrity of your home’s plumbing system. The constant shockwaves produced by water hammer or high pressure can lead to visible and hidden damages alike. Over time, the recurring force exerted on the pipe joints and connections can cause them to loosen, leading to leaks that may remain undetected until they’ve caused substantial damage. Furthermore, the constant vibrations can result in the gradual wear and tear of the pipe’s material, potentially leading to cracks or even bursts.

Impact on Walls and Structures

The effects of pipes banging against walls and adjacent structures can be quite damaging, impacting both the aesthetic and structural integrity of your home. As pipes consistently knock against walls, vibrations can lead to gradual wear and tear of the wall structure, potentially causing cracks, chipping, and even structural weakening over time. Paint and plaster may flake off, resulting in unsightly marks and necessitating frequent and costly repairs. Moreover, the incessant vibrations can loosen wall fixtures and fittings, causing them to fail prematurely.

wall water damage

Dealing with Noisy Valves and Faucets

Valves and faucets play a pivotal role in your home’s plumbing system. Any issues with these components can contribute to the unsettling phenomenon of pipes banging. Often, the noises emanate from dysfunctional valves or faucets that fail to control the water flow properly. This failure can result in sudden water pressure changes, leading to distinct knocking sounds.

Common Valve and Faucet Issues Causing Pipe Banging

Faulty Pressure Relief Valves: These valves control the water pressure within your pipes. If malfunctioning, they can cause an abrupt increase or decrease in pressure, resulting in pipe knocking.

Loose Faucet Components: Loose components in a faucet can create irregular water flow, inducing sudden pressure changes and, thus, pipe noise.

Malfunctioning Washer: A malfunctioning washer within a valve can disrupt consistent water flow, causing the pipes to bang.

Preventive Measures

regular plumbing maintenance

It’s crucial to address the cause of the banging pipes promptly, not only to prevent damage to your plumbing system but also to safeguard the structural integrity of your walls and home.

Get Regular Pipe Maintenance: Schedule regular maintenance with a professional plumber to assess and fix any potential issues before they cause larger problems.

Check and Adjust Water Pressure: If your water pressure is consistently above 60psi, consider installing a pressure regulator to reduce the strain on your pipes.

Insulate Pipes: Thermal expansion can be a major contributor to banging pipes, particularly in hot water lines. Consider insulating your pipes to absorb the shock of thermal expansion.

Re-secure Pipes: Ensure that all pipes are securely fastened with straps or clips, leaving enough room for expansion as needed.

Install Water Hammer Arrestors: These devices help absorb the shockwave created by water hammer and can be installed at specific points in your plumbing system.

Upgrade Piping Systems: If you have old or damaged pipes, consider upgrading to modern materials like PEX or copper. Newer piping systems are more durable and resistant to wear and tear.

When to Call a Professional

If you notice warning signs like persistent noises after attempting self-troubleshooting, visible pipe damage, or uncontrollable water leaks, it’s a clear indication that professional assistance is needed. Moreover, you might encounter more complex issues, such as outdated plumbing systems or extensive pipe damage, that require the expertise of a seasoned professional.

When choosing a professional plumber or plumbing service, look for credentials such as licenses and certifications, positive customer reviews, and a proven track record in handling similar issues. Ensure the service offers a comprehensive solution, addressing not just the symptoms but the root cause of the banging pipes.


When it comes to preserving the integrity of your home’s plumbing and overall structural health, professional expertise is irreplaceable. However, with the right knowledge and preventive measures, you can significantly reduce the risk of banging pipes. By understanding the common causes and implementing proper maintenance techniques, you can ensure a quiet and peaceful home environment for years to come. For any concerns regarding loud noise in your pipework, rely on Viper Services for dependable and emergency plumbing services and maintenance.

Don’t let pesky pipe noises rob you of your peace and tranquility – call Viper Services (864) 304-1734 to schedule a service today!

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Brian Childers