Most homeowners expect their plumbing system to be silent and efficient. So when your pipes start making strange noises—knocking, gurgling, whistling, or banging—it can be a little unsettling. The truth is, your pipes might be trying to tell you something, and understanding these noises can help prevent costly plumbing issues down the line.
In this guide, we’ll explore common plumbing noises, what causes them, and when it’s time to call in a professional. At Green Group, we help homeowners throughout Nashville, Murfreesboro, and Franklin decode what their pipes are saying—and fix the problem before it gets worse.
Banging or Knocking Pipes (Water Hammer)
One of the most common—and loudest—plumbing noises is a sharp banging sound when you turn off a faucet or appliance. This phenomenon is known as water hammer.
What Causes It?
Water hammer occurs when flowing water suddenly stops or changes direction, causing a pressure surge that bangs against the walls of the pipe. It’s usually due to:
- Loose or broken pipe supports
- High water pressure
- Missing or failing air chambers
- Quick-closing valves in appliances like dishwashers or washing machines
Why You Shouldn’t Ignore It
Left unchecked, water hammer can lead to pipe damage, leaks, or joint failure. It’s not just annoying—it’s a signal your plumbing system needs attention.
How Green Group Can Help
We’ll inspect your system to determine the cause of the noise and recommend the right solution, whether it’s installing a water hammer arrestor, adjusting pressure levels, or securing loose pipes. Call 615.756.5057 today to silence those bangs.
Whistling or Screeching Sounds from Faucets
If you hear a high-pitched whistle or screech when turning on a faucet, it could be caused by a worn-out or partially closed valve.
What Causes It?
- Worn washers or internal faucet parts
- Mineral buildup restricting water flow
- Loose or misaligned valve components
- Water pressure that’s too high for certain fixtures
Why It’s a Problem
Over time, these sounds can get worse and may signal that your faucet is on the verge of failure. In some cases, the sound could be coming from your pipes, indicating a broader issue with water pressure or flow regulation.
Our Fix
Green Group can repair or replace faulty faucet components, perform a pressure assessment, and flush any mineral buildup causing the problem. Don’t ignore screeching faucets—they’re not just irritating, they’re early warning signs.
Gurgling Drains and Toilets
Gurgling sounds coming from your toilet, sink, or shower drain typically indicate a venting issue or a partial blockage somewhere in your plumbing system.
What It Means
- Blocked or slow drains cause air to be pushed back up through your pipes, creating a gurgling noise
- A clogged plumbing vent (usually on the roof) can prevent proper airflow, disrupting drainage
- Sewer line issues or buildup in main drain lines can also cause gurgling
Why It Matters
Gurgling may sound minor, but it often precedes a complete blockage or backup. In some cases, it could even signal a developing sewer problem, especially if accompanied by foul smells.
What Green Group Does
We offer drain camera inspections, sewer line cleaning, and vent system evaluations to get to the root of the noise. Early diagnosis can save you from messy and expensive emergencies. Schedule an inspection today at www.greengrouptn.com or call 615.756.5057.
Dripping Sounds Without a Visible Leak
You might hear dripping or tapping sounds in the walls or ceiling even when no faucets are on. This can be tricky—it may not be a leak, but it still warrants attention.
What Might Be Happening
- Expansion and contraction of hot water pipes can cause tapping or ticking
- Drips in hidden locations (inside walls or under floors)
- A poorly secured pipe vibrating against wood or drywall
- Condensation forming and dripping from cold pipes
When to Be Concerned
If you hear these noises regularly or at night when the house is quiet, it’s worth having it checked. A small leak today can lead to water damage, mold growth, and costly drywall repairs tomorrow.
How We Solve It
Green Group uses acoustic leak detection tools to pinpoint hidden leaks and can insulate or secure noisy pipes. Don’t dismiss that “harmless” dripping sound—it could be costing you money.
Running Water Sounds When Nothing’s On
Hearing water flowing when no taps are open is often a sign of a leak in the supply line or within walls.
Potential Causes
- Cracked or damaged water pipes
- Running toilets or leaking appliances
- Slab leaks (beneath the foundation)
- Continuous refill in a malfunctioning toilet tank
Why This Can Be Serious
This is often one of the most overlooked plumbing noises—and also one of the most damaging. It could lead to mold, foundation damage, or high water bills if left unchecked.
What to Do
Call Green Group immediately at 615.756.5057. Our team is trained to detect even the most elusive leaks using advanced tools that minimize disruption to your home.
Bubbling or Burbling in Pipes During Use
Bubbling noises often indicate that air is trapped in the plumbing system. It can happen during use of water fixtures or shortly after they’re turned off.
Possible Reasons
- Improperly sloped drain pipes
- Air gaps in the water heater or piping
- Vacuum effect from faulty venting
- Low spots in plumbing where air collects
When It’s an Issue
While air in the pipes isn’t always dangerous, it can lead to corrosion, pressure problems, and inconsistent water flow. In systems with well water or older designs, it may be more common.
Green Group’s Approach
We’ll examine your venting, piping layout, and water pressure, and make adjustments to eliminate air pockets and improve flow. Say goodbye to that weird burbling with one quick service call.
When to Call the Experts
Some plumbing noises are harmless—but many are your system’s way of telling you something needs attention. Whether it’s a loose pipe, a hidden leak, or poor water pressure, strange sounds are often early indicators of larger issues.
Green Group proudly serves Nashville, Murfreesboro, and Franklin with trusted, high-quality plumbing diagnostics and repairs. If your pipes are making noises you don’t recognize, don’t wait for something to break.
Call Green Group at 615.756.5057 or visit www.greengrouptn.com to schedule a plumbing inspection. We’ll make sure your system is quiet, efficient, and built to last.
Your pipes are talking. Green Group is here to listen—and fix the problem.
