Noisy pipework and kettling: telling the two apart by sound

What matters most with noisy pipework distinct from boiler kettling

• Ticking pipes usually mean thermal expansion against tight clips or joists
• The fix is often as simple as loosening or replacing a pipe clip
• Kettling specifically comes from inside the boiler's heat exchanger
• Pipe noise tends to happen right as heating fires up or shuts off
• Lagging pipework at pinch points can quieten expansion noise significantly

What we check first with noisy pipework distinct from boiler kettling

Copper pipework expands slightly as it heats and contracts as it cools, and where it passes through joists or is held by clips fitted too tightly, that movement produces audible ticks or bangs, particularly as the heating first fires up. This is mechanical rather than water-quality related, unlike kettling, which comes specifically from steam pockets forming and collapsing inside a scaled or restricted boiler heat exchanger and sounds more like a rumble or a distant kettle boiling.

Where we deal with this

• Blagdon (BS40) · 9 mi
• Butcombe (BS40) · 10 mi
• Holt (BA14) · 11 mi

Questions we get asked

How can I tell if it's pipework or the boiler making the noise?

Trace the sound while the heating cycles — noise following the pipe run away from the boiler points to pipework, while a rumble at the boiler itself suggests kettling.

Is pipe ticking anything to worry about?

It is usually harmless mechanically, though persistent loud banging is worth having checked in case pipework has come loose from its fixings.