What to Do When Your Pipe Bursts: Immediate Actions
A burst pipe can flood your home within minutes, causing thousands of pounds in damage. The first moments count. Your immediate priority is to stop water flowing into your property, then contact a professional.
The most critical step is locating your water stopcock and turning it off. This is usually under the kitchen sink, in the basement, or outside near the boundary of your property. Turn the valve clockwise firmly but don't force it. Once off, open all taps to drain remaining water from the pipes. This action alone can prevent the majority of water damage.
If you cannot find your stopcock, contact your water supplier immediately. In London, Thames Water operates most of the network. They can shut off supply at the mains if you're unable to do so. Have your account number ready.
After stopping the water, document everything with photos and videos. This evidence supports insurance claims later. Don't be shy about capturing the mess. Move electrical appliances away from wet areas and turn off electrics if water is near sockets. Water and electrics don't mix.
Identifying Where the Burst Has Occurred
Not all burst pipes are obvious. Some run inside walls or underground. Look for these signs:
- Water trickling from ceilings or walls
- Patches of damp or discolouration on plaster
- Soft spots in wallpaper or paint bubbling away
- Unusually high water bills with no explanation
- The sound of running water when all taps are off
- Garden subsidence or soggy patches outside
Visible bursts under sinks or in cellars are straightforward to spot. The difficult ones are internal pipe leaks, which may only show as damp patches appearing hours or days later. If you notice any of these signs, call an emergency plumber even if the initial crisis seems resolved.
Some bursts occur on the shared supply between the mains and your property boundary. If you've turned off your stopcock but water is still entering your home, the damage is likely on Thames Water's side. They attend these free of charge, but response times vary. During winter, their teams are overwhelmed.
Contacting an Emergency Plumber in London
Once water is stopped, you need a qualified professional. Response times vary depending on your location in London and the time of day. A burst pipe on a Saturday night in central London typically gets faster attendance than one in outer areas on a weekday morning because emergency call volume fluctuates.
When calling, provide these specific details:
- Your full address and postcode
- Whether the stopcock is already off (affects urgency)
- Whether you have active water damage or just a damp patch
- What time the problem started
- Whether the burst is inside or outside the property
Most emergency plumbers charge a call-out fee of £80–£150 plus labour and materials. Some waive the call-out if you proceed with the repair work. Rates between 8am and 5pm weekdays are lower than evenings, weekends, and Bank Holidays. A simple burst pipe repair typically costs £200–£400 including the call-out, though this varies based on location and pipe accessibility.
If you have home insurance, check whether it covers emergency plumbing. Many policies include £500–£1000 for emergency repairs. Some require you to use approved contractors, so ring the insurer before booking a plumber. This matters because some insurers won't reimburse if you use non-approved traders.
Winter Burst Pipes: Why They Happen and Prevention
December through February sees a spike in burst pipe emergencies across London. Water expands when it freezes, and temperatures below zero Celsius put exposed pipes at risk. Pipes in unheated lofts, external walls, and sheds freeze first.
Take these preventative steps now:
- Lag exposed pipes with foam insulation (£2–£5 per metre)
- Leave cabinet doors under sinks open so warm air circulates
- Allow taps to drip slowly during freezing nights (moving water resists freezing)
- Keep loft hatches closed but ensure lofts aren't sealed air-tight (condensation causes problems)
- Drain exterior taps and remove hoses before winter
- Heat loft spaces with a thermostat-controlled heater if pipes run there
If you suspect frozen pipes but haven't yet burst, apply heat gently. A hot water bottle placed against the pipe or a hair dryer on low heat can thaw it. Never use direct flame. If the pipe has burst, thawing it won't stop the damage, so focus on the stopcock instead.
Insurance Claims and Damage Recovery
Document the sequence of events carefully for your insurer. Photos of the burst site, the damage caused, and any repairs undertaken form your evidence. Keep all plumber invoices, as insurers will request itemised breakdowns of labour and materials.
Some policies have excess payments of £100–£250, meaning you pay this amount before the insurer covers costs. Others cover unlimited emergency plumbing repairs as standard. It's worth reviewing your policy now rather than discovering gaps when you need it.
Water damage claims are relatively straightforward if the burst happens indoors. External bursts on your side of the property boundary (before the water meter) may fall under different terms. Underground bursts cause the most complexity because excavation becomes necessary and costs balloon quickly.
If the burst is Thames Water's responsibility (after the meter), you won't pay for their emergency attendance. However, you may still claim the cost of internal water damage through your home insurance, then pursue Thames Water for reimbursement separately. This process is slower but ensures you're not left out of pocket.
When to Call Thames Water vs. a Private Plumber
The water meter marks the boundary of Thames Water's responsibility. Pipes and problems before the meter are theirs; everything after is yours. If you don't know where your meter sits, it's usually outside in a small chamber at the front of the property.
Call Thames Water's emergency line (0800 316 3272, available 24/7) if:
- The burst is between the mains and your property boundary
- Water is erupting from the pavement or ground outside
- You suspect a leak on their main pipe (unusual water sounds from the street)
Call a private emergency plumber if the burst is inside your property or clearly on your side of the meter. Private plumbers are usually faster anyway, with response times of 30–90 minutes in London depending on location and availability.
Comparing Quotes and Choosing a Plumber
Never accept the first quote. Emergency situations push some plumbers to inflate prices. Ring three different providers and compare their call-out fees, hourly rates, and estimated total costs based on your description. A reputable plumber can often quote over the phone before attending.
Check credentials: look for Gas Safe Registration if gas work is involved and plumbing qualifications. Online reviews on Trustpilot or Google reveal patterns in customer experience. A plumber with ten 4-star reviews is more reliable than one with two 5-star reviews.
Ask whether the quote includes VAT, parts, and labour or if additional charges apply. Some plumbers charge a fixed price for straightforward repairs; others charge hourly. Fixed prices protect you better in emergencies.
Compare quotes from three providers before making a decision. This simple step saves hundreds of pounds on emergency plumbing work in London.
