6 Signs Your Pipes Are About to Freeze Act Before 0°C Hits

Wintry Freeze conditions are tightening their grip across large parts of the UK, with Storm Goretti expected to arrive on Thursday following snow, ice and a series of cold weather warnings.

Energy firms and water companies are urging households to stay alert. British Gas has warned customers about an increased risk of frozen pipes, while South West Water has asked homeowners to prepare for a potential surge in burst pipes.

With temperatures falling well below freezing in some areas, experts say early warning signs can help prevent costly damage.

Warning signs your pipes may be freezing

Unusual sounds from your plumbing are often the first clue that something is wrong. Gurgling, banging or knocking noises from pipes or central heating systems can indicate ice forming inside.

Other signs include reduced water flow or taps that stop running altogether.

“The first warning signs of frozen pipes include little or no water from taps, frost or condensation on pipes, a cold or non working boiler, and a toilet that will not refill,” said Steve Harris, a technical support engineer at Wavin.

British Gas advises households to watch out for the following:

Gurgling sounds when the heating is on
A boiler that will not start
No water, or only a trickle, from taps
Slow draining sinks or toilets flushing sluggishly

When are pipes most at risk?

Temperatures this week have dropped sharply, with a low of minus 12.5C recorded overnight in Marham, Norfolk. The Met Office has issued a yellow warning for ice covering the bottom half of Scotland, much of Wales and almost all of England.

Pipes can freeze whenever temperatures fall below zero, particularly during prolonged cold spells. Risk increases when pipes run through unheated areas such as lofts, garages or under sinks, or when water has not been used for extended periods.

Harris, who has more than 20 years of plumbing experience, said copper pipes are especially vulnerable, as are homes left empty during winter holidays with the heating turned off.

How to prevent pipes from freezing

Preparation is key. South West Water recommends insulating exposed pipes and water tanks with lagging, especially in unheated spaces like lofts, garages and outdoor areas.

Leaving the heating on a low setting, around 13C, when you are away from home can also reduce the risk. Bleeding radiators and ensuring your boiler has been serviced are practical steps that can make a difference.

It is also important to know where your internal stop tap is located, so you can act quickly if a pipe bursts.

“Cover exposed pipes in cold areas and keep indoor temperatures stable,” Harris said. “Open cupboard doors under sinks to let warm air circulate around the plumbing.”

What to do if your pipes freeze

Frozen pipes are most likely in colder parts of the home, such as lofts, garages and under sinks. If you suspect a pipe has frozen, turn off the water supply immediately at the stop tap.

“Use a hairdryer or hot towels to gently thaw the pipe,” Harris advised. “Check carefully for cracks before turning the water back on.”

He warned against trying to thaw pipes too quickly. Never use a blowtorch or naked flame, as sudden heat can cause pipes to warp or split.

If your heating stops working

As overnight temperatures continue to fall, households may also experience boiler pressure drops or system resets.

Joanna Flowers, a British Gas service and repair engineer, said people should carry out basic checks before calling for help.

“Check for frozen or burst pipes and make sure your boiler settings are correct,” she said. “Look at the pressure gauge. It should be between 1 and 1.5 bar. If it is below 1, the system needs repressurising.”

If resetting the boiler does not work, check the condensate pipe. If it is frozen, slowly pour hot, not boiling, water over it and insulate it with a hot water bottle.

Signs of a burst pipe include damp patches on walls or floors. If you spot these, turn off the water supply and open all taps to drain the system until an engineer arrives.

British Gas said customers who call before 11am may be eligible for same day assistance if problems persist.

With freezing conditions set to continue, experts say vigilance and early action can help households avoid serious damage during the cold snap.