Pipes Making Noise When Water Runs? 5 Likely Reasons and Fixes

Hearing strange sounds when you turn on the tap? Whether it’s banging, clanging, whistling or vibrating, noisy pipes are more than just an annoyance — they could be a sign of an underlying issue in your plumbing system.

At Pleasant Plumbers, we help homeowners across London identify and fix noisy pipework before it turns into something more serious. Below are the 5 most common causes of noisy pipes when water is turned on — and how to fix them.

What it is:
A sudden ‘bang’ or thud when you turn the tap off is known as water hammer. It happens when fast-moving water hits a closed valve and causes shockwaves through the pipework.

What causes it:

• Loose pipework
• Worn-out stop valves
• High water pressure

Fix it:

• Fit a water hammer arrestor
• Reduce water pressure at the stopcock
• Secure loose pipes with brackets or clips

What it sounds like:
Loud rushing, squealing, or vibrating sounds when taps are turned on — especially in upstairs bathrooms or showers.

What causes it:
If your water pressure is too high, it can force water too quickly through your pipes, causing vibrations and wear on joints and fittings.

Fix it:

• Use a pressure reducing valve (PRV)
• Check with your local water supplier for guidance
• Have your system pressure tested by a plumber

What it sounds like:
Gurgling or bubbling noises when taps are first turned on.

What causes it:
Air pockets can get trapped in your plumbing system, especially after maintenance or if water has been turned off for any reason.

Fix it:

• Bleed your radiators (in sealed systems)
• Run all taps for several minutes to flush the air out
• Contact a plumber if air persists — it could indicate a design flaw in the pipe layout

What it sounds like:
Rattling or knocking sounds from behind walls, floors, or ceilings.

What causes it:
Pipes that aren't clipped or supported properly will move when water flows, especially if valves are suddenly opened or closed.

Fix it:

• Secure pipework with brackets, especially near elbows and bends
• Check for rubbing or friction against wood or plaster
• Add insulation sleeves to reduce vibration

What it sounds like:
Screeching or whistling when the tap is turned on.

What causes it:
Old or damaged washers or internal valves inside taps can restrict water flow unevenly, causing vibrations.

Fix it:

• Replace tap washers or cartridges
• In modern mixer taps, fit a replacement ceramic disc cartridge
• Have noisy taps assessed by a plumber for deeper faults

If you’ve tried the basics and the noise continues — or if the noise has become more frequent or aggressive — it’s time to call a professional.

At Pleasant Plumbers, we offer rapid diagnostics and long-term solutions for noisy pipework across London. We’ll assess your system, identify the cause, and prevent further wear or leaks.

Whether you’re hearing banging from the ceiling or screeching in the kitchen tap, we’ll get it sorted — fast, cleanly, and with minimal disruption.

📲 Call or WhatsApp 0800 046 1000
📧 Email info@pleasantplumbers.com
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