Quick Answer
If you have a burst pipe, immediately turn off your stopcock (mains water supply), switch off your boiler, open all cold taps to drain the system, and call an emergency plumber. The faster you shut off the water, the less damage you will have.
A burst pipe is one of the most stressful plumbing emergencies a UK homeowner can face. Water pouring from a ceiling, flooding through walls, or spreading across floors can cause thousands of pounds of damage in minutes — and that's before you factor in secondary damage to electrics, furniture, and flooring. In 2026, with colder winters and ageing pipework in many UK properties, knowing exactly what to do in the first ten minutes is genuinely valuable knowledge.
This guide gives you a clear action plan for the emergency phase, explains how to minimise damage while waiting for a plumber, tells you where your stopcock is likely to be, and covers how to prevent burst pipes in winter in the first place.
In this guide
Immediate Steps: The First 10 Minutes
Speed matters enormously with a burst pipe. Every minute of uncontrolled flow adds damage. Follow these steps in order:
- 1
Turn off your mains stopcock immediately
This is the single most important action. The stopcock cuts the water supply into your property, stopping the flow at source. Find it now — before you need it. It is usually under the kitchen sink, in a utility room, or near the front door.
- 2
Switch off your boiler and central heating
Water and electrics are a dangerous combination. Switch the boiler off at the programmer or thermostat. If water has reached any electrical fittings, switch off the consumer unit (fuse board) as well.
- 3
Turn on all cold taps
This drains the water remaining in the pipes above the stopcock, reducing the volume of water that can still flow out from the burst.
- 4
Do not use any electrical switches in the affected area
If water is dripping from a ceiling light or near a socket, treat it as an electrical hazard. Leave those circuits off until an electrician confirms they are safe.
- 5
Collect the water and protect belongings
Use buckets, towels, and containers. Move valuables, electronics, and documents out of the way. If water is coming through a ceiling, pierce a small hole at the lowest point to direct the flow into a bucket — counterintuitively, this prevents the ceiling collapsing under the weight of water.
- 6
Document everything with photos and video
Before cleanup, photograph and video all damage. This is essential for insurance claims.
- 7
Call an emergency plumber
Once the flow is stopped, call a qualified plumber. Describe what has happened, whether you have shut off the water, and the location of the burst if known.
Finding Your Stopcock
In the panic of a burst pipe, the last thing you want is to be searching for the stopcock. Most UK homes have two stopcocks you should know about:
| Stopcock Type | Location | What It Controls |
|---|---|---|
| Internal stopcock (main) | Under kitchen sink, utility room, under stairs, near front door | Cuts all water into the property |
| External stopcock (outside) | Under a small metal cover in the pavement or driveway | Cuts water to the whole property from the street — needs a long key |
| Individual isolation valves | Behind toilet cisterns, under basins, on radiator valves | Cuts water to a single appliance |
Find your internal stopcock today and make sure every adult in the household knows where it is. Check it turns easily — stopcocks that are not operated for years can seize up. A quick turn once a year keeps it functional.
Minimising Damage While You Wait
Once the water is off, you have time to manage the situation before the plumber arrives. Key actions:
- ✓ Use a wet/dry vacuum or pump if you have standing water
- ✓ Open windows to dry out affected rooms (but not in freezing weather)
- ✓ Lift carpets and rugs to allow the subfloor to dry
- ✓ Keep the affected area warm to prevent secondary mould growth
- ✓ Contact your home insurer as soon as possible — many policies require prompt notification
When to Call an Emergency Plumber
Call an emergency plumber immediately if: you cannot find or operate the stopcock, the burst is in the boiler or central heating system, water is near electrical fittings, or you suspect the pipe is in a wall and the water is still seeping. For guidance on finding a reliable plumber, see our guide on how to find a reliable plumber in the UK.
For emergency call-out costs, see our full article on emergency plumber call-out costs in the UK. Expect to pay £100–£300 call-out fee plus £80–£150 per hour on top, with evening and weekend premiums. Post your emergency job on GetQuickHelp to find local plumbers who can respond quickly.
Preventing Burst Pipes in Winter
The majority of UK burst pipes occur when temperatures drop below freezing and water in exposed pipes expands as it freezes. Pipes in unheated loft spaces, garages, and external walls are most at risk. Prevention measures:
- ✓ Lag pipes in unheated areas with foam pipe lagging (a £5 DIY job per pipe run)
- ✓ Keep your heating on low (minimum 12°C) if you are away in winter, or use a frost thermostat
- ✓ Insulate your loft — not just for energy saving, but to keep the loft above freezing
- ✓ Know where your stopcock is and ensure it turns easily before winter
- ✓ If you go away, turn off the water at the stopcock as a precaution
For more winter preparation advice, see our guide on how to prepare your boiler for winter and how to winterise your home in the UK.
Frequently Asked Questions
Does home insurance cover burst pipes?+
Most buildings insurance policies cover sudden and unexpected water damage from burst or frozen pipes. Slow leaks or damage from wear and tear are usually not covered. Check your policy's "escape of water" section. Crucially, many policies require you to take reasonable steps to prevent burst pipes — which means lagging exposed pipework.
What causes pipes to burst?+
The most common cause in UK homes is freezing — water expands when it freezes, cracking the pipe. Other causes include: old or corroded pipework, physical impact, high water pressure, and freeze-thaw cycles in poorly insulated loft spaces. Copper pipes can also develop pinhole leaks from corrosion over decades.
How much does it cost to repair a burst pipe?+
An exposed pipe repair typically costs £100–£250 in labour plus parts. A concealed burst pipe (in a wall or under a floor) can cost £300–£1,000+ because of the access required. Emergency call-out charges (£100–£300) are added on top. Always get the final cost agreed before the plumber starts opening walls.
Can I use a temporary repair while I wait for a plumber?+
For very small leaks, you can use self-amalgamating tape or a pipe repair clamp as a temporary measure. These are available from DIY stores. However, these are not permanent fixes and should be replaced by a proper repair as soon as possible. Do not use these on gas pipes under any circumstances.
My ceiling is soaking and bulging — what do I do?+
A water-logged plasterboard ceiling can collapse under its own weight. If the ceiling is bulging, use a screwdriver or skewer to pierce it at the lowest point before it falls — this allows controlled drainage into a bucket rather than a sudden collapse. Switch off any electrical fittings in the area first.
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