Common Reasons and Easy Fixes for Banging Water Pipes

Hearing clanging, banging, and knocking sounds coming from the pipes in your home can be jarring, especially when they come out of nowhere. While it’s easy to imagine worst-case plumbing scenarios, we here at Mike Counsil Plumbing and Rooter can assure you that most of the time, banging water pipes aren’t a cause for panic. However, they can be a nuisance and, in some cases, might indicate an issue that needs addressing to avoid potential problems down the road. Let’s examine some of the reasons you might be hearing these bothersome noises, what you can do to address them, and when it’s time to call for professional help in the San Jose, CA area.

Why Are My Water Pipes Banging?

Understanding the cause of noisy water pipes is the first step to addressing the issue. Here are the primary reasons this problem occurs, especially in copper pipes:

Loose Pipes

Pipes that aren’t securely fastened can move as water flows through them. This movement is often the result of sudden changes in water pressure. The resulting noise can occur at joints in the pipe run, where it comes into contact with other pipes, or from banging against nearby surfaces, such as walls or beams.

Pipes Touching Joists or Beams

Sometimes, pipes passing through holes in joists or beams can come into contact with the surrounding wood. The pressure changes from the flowing water we talked about above cause movement within the pipes, resulting in an irritating banging noise.

Water Hammer

Water hammer occurs when water flow is abruptly stopped or redirected, creating a shockwave within the pipes. This typically happens when appliances such as dishwashers or washing machines are in use—the shut-off valves in home appliances close quickly, causing an abrupt halt similar to slamming on the brakes. Water hammer is less common when turning off a sink faucet because those valves close more gradually. Older homes may have vertical pipes that are capped and filled with air, designed to absorb this shock. However, over time, these can become waterlogged and lose their effectiveness.

By identifying when and where you hear these noises, you’ll be better equipped to choose the right solution.

DIY Solutions to Fix Loud Water Pipes

Once you’ve identified when and where you hear the noises, you can take action. If you’re handy around the house, several DIY fixes can help reduce or eliminate the noise coming from your pipes. Follow these steps to address some of the most common causes:

Secure Loose Pipes

Start by inspecting exposed pipes in areas like crawl spaces or utility rooms. Gently push on the pipes to see if they move. If they do, use plastic pipe straps or clamps to secure them to nearby joists or studs. Best practices advise securing the pipes every 16 inches and at every change of direction to minimize movement.

Add Insulation to Pipes

Exposed pipes, especially those carrying hot water, often expand and contract in response to temperature changes, resulting in noise. Insulating these pipes can help reduce the sound. Look for foam pipe insulation that’s easy to slip over the pipes and secure in place.

Separate Pipes From Joists or Beams

If pipes pass through tight spaces in joists or beams and contact the wood, use flexible foam padding or rubber grommets to cushion them. You can also use plumbing straps at these intersections to add stability. This will help absorb movement and minimize noise.

Try the Drain-and-Refill Method

For older homes with water hammer issues, you may need to restore the air chambers in your system. If you’re confident with your skills and know the location of your main water shut-off, follow this process:

• Turn off the main water supply
• Open all faucets and flush all toilets to drain the water out of the pipes
• Once the system is drained, close all faucets
• Slowly turn the water supply back on
• Starting at the highest point in the home, slowly turn all faucets back on

This will purge air out of the pipes. Run the water until sputtering is no longer present and the water runs clear.

When to Call a Professional Plumber

While these solutions are effective for many common problems and can be completed by a handy homeowner, some fixes require the expertise of a licensed plumber. Our company also understands that some homeowners aren’t comfortable with DIY methods. Here are situations where calling a professional plumber is the best move:

Water Pressure Needs to Be Measured and Adjusted

Excessively high water pressure, often exceeding the recommended 70-80 psi range, creates stress on your pipes and can lead to banging. A licensed plumber can measure your water pressure and, if necessary, install a pressure regulator to ensure it stays within a safe range, thereby reducing banging and clanging caused by excessive pressure.

You Want to Install a Water Hammer Arrestor

To address water hammer, plumbers can install water hammer arrestors near fixtures prone to causing noise, such as washing machines and dishwashers. These modern devices absorb the shock of suddenly stopped water flow, preventing it from creating that unsettling banging noise.

You’re More Comfortable With Professional Expertise

If you’re uncomfortable tackling these solutions on your own or the noise persists despite your efforts, a professional plumber can diagnose and resolve the issue efficiently. Our expertise ensures that the problem is fixed without causing further damage or stress.

Don’t Let Noisy Pipes Disrupt Your Peace

The noise might be annoying, but Mike Counsil Plumbing and Rooter has solutions for your banging pipes in the San Jose, CA area. With a bit of effort, you might be able to diagnose and correct the issue on your own. If not, or you’re more comfortable with a pro, contact us today for plumbing services. Our licensed plumbers are here to help with all your plumbing and drain needs.