No water at the tap on a freezing morning? A pipe may have frozen, and it could already be damaged. The tricky part is that a split doesn’t always start leaking until the ice melts. So take it slowly, know where your stop tap is, and don’t keep turning the water back on to “see what happens”.
This is the hands-on follow-up to winter pipe prevention: what to check and what you can safely do when a pipe has already frozen.
Frozen pipe or burst pipe: what should you look for?
A frozen pipe is possible if a tap has little or no flow, especially after a cold night. You might also see frost on an exposed pipe, or hear gurgling from the plumbing. One tap not working doesn’t prove the pipe is frozen, but it’s a good reason to check nearby pipework if you can do so safely.
A burst or split pipe is more likely if you spot:
- A bulge, crack or distorted section of pipe.
- Water dripping or spraying from a pipe or joint.
- A new damp patch or stain on a ceiling or wall.
- Water pooling beneath a pipe, or appearing somewhere it shouldn’t.
A frozen pipe can split while the water inside is ice. When it thaws, water can escape through that damage. That’s why restored flow isn’t proof everything is fine.
Which pipes tend to freeze first?
Start with pipework in colder or less-heated parts of the property. Common vulnerable spots include:
- Lofts, especially pipes near the roof or outside air.
- Runs along outside walls or through cold cupboards.
- Outdoor taps and the pipes feeding them.
- Unheated garages, sheds and other outbuildings.
If you can see a pipe safely from floor level, look for frost or a visibly swollen area. Don’t climb into an awkward loft space or pull apart boxing to investigate. A pipe hidden behind a tiled wall or ceiling is one to leave to a plumber.
How to thaw an accessible frozen pipe safely
WaterSafe and South East Water advise shutting off the water supply before thawing and using gentle warmth, not a naked flame. If there’s any sign the pipe has burst, leave the supply off and go to the burst-pipe steps below. (WaterSafe frozen-pipe advice; South East Water winter guidance.)
- Find and turn off your internal stop tap. It’s often under the kitchen sink, in a cupboard, garage or cellar. Turn it clockwise, gently. If you’re unsure where it is, South East Water’s guide to finding and turning off your stop tap may help.
- Open the affected tap. If possible, open the lowest tap in the property too. This gives water somewhere to drain as the ice melts and helps relieve pressure.
- Warm the pipe gradually, starting near the tap and working backwards. Use a hot-water bottle, a warm towel, or a hairdryer on a low setting. Keep the hairdryer and plug well away from water, and only use it if the area and your hands are dry.
- Pause and check as you go. Don’t rush to turn the supply back on. If you notice a bulge, a crack, dampness or a leak, stop thawing and keep the stop tap off.
Never use a blowtorch, another naked flame, or a kettle poured over the pipe. Concentrated heat can damage the pipe or nearby materials, and a sudden thaw can reveal a split in a hurry.
Why slow thawing matters
Ice can stretch or weaken pipework before you see any water. A rapid thaw may bring the pipe back into use quickly, but it can also turn hidden damage into a sudden gush. Gradual warmth gives you more chance to spot a leak as the ice melts. It doesn’t guarantee the pipe is intact, so check it carefully before restoring the supply.
If you find a split: do this first
- Turn off the mains water at the stop tap.
- Open taps to drain the pipework and reduce the amount of water left in the system.
- Switch off the boiler or heating if it’s safe to do so, following the controls or instructions for your system.
- If water is near sockets or electrical equipment, keep clear. Turn off the electricity at the consumer unit only if you can reach it safely without stepping in water or touching anything wet. If not, don’t risk it.
- Use towels and a bucket to limit the mess, if it’s safe. Move belongings out of the way and take photos of any damage for your records.
- Arrange a plumber to inspect and repair the pipe. Tape or a towel might contain a drip temporarily, but it isn’t a permanent repair.
WaterSafe also advises shutting off the supply, draining the system and contacting a plumber if a pipe bursts. See its burst-pipe guidance.
When to stop and call a plumber
A careful DIY thaw is only for pipework you can reach easily and safely. Stop and get professional help if:
- The pipe is bulging, split or leaking.
- Water has appeared on a ceiling, wall or floor.
- You can’t reach the frozen section without climbing, dismantling or moving heavy items.
- You suspect a pipe is behind tiled walls, under flooring or inside a ceiling.
- You aren’t sure whether the leak is from a water pipe or another part of the system.
Copper pipe behind tiles is particularly easy to damage if you start chiselling or drilling to find it. Keep the water off if a leak is suspected and book an inspection instead.
For homeowners looking for split pipe repair in Aldershot or water leak repair in Farnborough, we can talk through the issue and arrange a visit at a time that works. Find out more about our plumbing services or contact Heat Eco.
Service area: Aldershot, Farnborough, Farnham, Guildford and surrounding areas
After the thaw: check again, not just once
When the pipe seems thawed, check the full accessible section and joints. Dry it with a cloth, then look for fresh moisture, tiny drips or a pinhole spray. If you see anything suspicious, close the stop tap again and leave the repair to a plumber.
If the pipe looks sound, restore the water cautiously and check taps around the home. Watch the pipe while water is running, then check again after you’ve turned the taps off. Look for damp patches on ceilings and walls over the next 24–48 hours too; a small leak can take time to show.
If you’re unsure, don’t keep testing the supply. Turn it off and get advice.
For next time, the short version is: lag exposed pipes and improve insulation around cold spots before the weather turns. It won’t fix a split that’s already happened, but it can help reduce the risk of another frozen-pipe morning.