Why Are My Pipes Making Noise?

Noisy pipes can hint at small issues or early signs of bigger problems. The sooner you understand what the noise means, the easier it is to prevent leaks, pipe damage, or a sudden plumbing emergency. This guide explains the most common reasons pipes make noise, what you can safely check yourself, and when you need professional plumbing services.

What Causes Noisy Pipes?

1. Expansion and Contraction

When hot water runs through cold pipes, the metal expands. As the pipes expand and press against wood framing or other materials, you may hear:

• Ticking

• Clicking

• Light knocking

This is common in older homes in Lemont, Lockport, Homer Glen, and surrounding areas, especially when temperatures start to drop. It’s usually not serious, but regular noise can point to loose pipe supports.

2. Loose Pipes

If a pipe is not tightly secured, it moves slightly when water flows through it. This creates:

• Rattling

• Vibrations

• Banging against walls or framing

Loose pipes are common in basements, crawl spaces, and older remodels. Over time, the movement can weaken joints and cause leaks.

3. Water Hammer

Water hammer is one of the most frequent reasons homeowners ask, “why are my pipes making noise?”

It happens when water flow stops suddenly—often when a valve closes fast. The sudden pressure shift sends a shockwave through the pipes, causing:

• Loud bangs

• Thuds behind walls

• Vibrations after shutting off a faucet or appliance

This issue is common in homes with older plumbing or high water pressure.

4. High Water Pressure

Homes in Lemont, Darien, Woodridge, and Romeoville often experience fluctuating city water pressure. When pressure gets too high, pipes start making noise such as:

• Whistling

• Humming

• Loud rushing sounds

High pressure puts strain on your plumbing system, appliances, and fixtures and can shorten their lifespan.

5. Sediment in Your Water Heater

If you hear noise when hot water runs, the sound may come from your water heater. Sediment buildup creates:

• Popping

• Rumbling

• Crackling

This happens more often in areas with hard water, which includes most Chicago Southwest Suburbs.

6. Air in the Pipes

Air pockets trapped in your plumbing lines can cause:

• Bubbles

• Sputtering faucets

• A tapping or knocking sound

This often happens after water shutoffs or repairs.

Why Pipes Get Noisy in Fall and Winter

Cold weather plays a big role in noisy plumbing systems. In Lemont and nearby towns, temperature swings cause pipes to contract fast. When hot water suddenly runs through them, they expand again—creating noise.

Seasonal changes also increase water heater use, raise household water demand, and tighten pipe fittings, all of which add stress to your plumbing system.

Safe DIY Checks You Can Do

Before calling a plumber, here are simple and safe steps you can take.

1. Check for Visible Loose Pipes

Look in:

• Basement

• Utility room

• Crawl space

• Under sinks

If you see a pipe that moves when water runs, it may need to be secured.

2. Test Water Pressure

You can buy a small pressure gauge at a hardware store.
Attach it to an outdoor spigot.
Normal pressure: 40–60 PSI.
Over 80 PSI needs attention.

3. Turn Off Taps Slowly

Fast closing valves cause water hammer. Try closing faucets more gently and see if the noise improves.

4. Flush the Water Heater

If you hear popping or rumbling when using hot water, sediment buildup may be the cause. A full flush removes debris and improves heating efficiency.

5. Bleed Air From Faucets

If your faucets spit water or shake, turn them on one at a time to release trapped air.

Important:
If noise gets louder, if you see water leaks, or if the pipe movement is strong, call a professional immediately. Noisy pipes can warn you of future damage.

When to Call a Plumber

You should contact a licensed plumber if:

• The noise is loud and sudden

• You see pipe movement or vibration

• Water pressure is above 80 PSI

• You hear banging after shutting off faucets

• You notice leaks or moisture

• The sound keeps getting worse

Homes in Lemont, Lockport, Bolingbrook, Willow Springs, and nearby suburbs often have older plumbing systems. Pipes behind walls can fail without warning if the issue isn’t fixed early.

How a Plumber Fixes Noisy Pipes

1. Securing Loose Pipes

A plumber will add supports, straps, or insulation to stop pipes from rattling.

2. Installing Water Hammer Arrestors

These devices absorb shockwaves and stop loud banging.

3. Adjusting Water Pressure

A pressure regulator may be installed or adjusted to protect your pipes and appliances.

4. Flushing or Servicing the Water Heater

This removes sediment and restores quiet operation.

5. Checking for Hidden Leaks

Noise can come from damaged or leaking pipes inside walls or ceilings.

6. Pipe Replacement

In older homes, worn or corroded pipes may need replacement for safety.

FAQs About Noisy Pipes

Why do my pipes make a knocking noise at night?

Temperature changes cause expansion and contraction. If pipes are not insulated well, they knock against framing.

Why does my water heater make noise?

Sediment buildup heats unevenly, causing popping and rumbling.

Why do pipes bang when I turn off the faucet?

This is a common sign of water hammer.

Is noisy plumbing dangerous?

Not always, but long-term noise can mean pressure issues or pipe movement that leads to leaks.

Local Insight for Lemont and Nearby Suburbs

Many homes in Lemont, Homer Glen, Lockport, and Bolingbrook were built between the 1970s and early 2000s. These homes often have:

• Older copper pipes

• Aging shutoff valves

• Loose fasteners

• Hard water sediment buildup

Cold winters in the Chicago Southwest Suburbs put extra stress on these systems, making noisy pipes a common call for Demmis Plumbing this time of year.

• Emergency Plumbing Services

• Water Heater Repair and Installation

   

For more details on water pressure recommendations, you can reference:
American Water Works Association (AWWA)

Conclusion

If you’re still asking, “why are my pipes making noise?”, it’s time to take a closer look before a small problem turns into a leak or burst pipe. Noise is often the first warning sign. Addressing it early saves money and protects your home.