Burst Pipe? Do These 4 Things Right Now

A burst pipe can flood a room in minutes. What you do in the first few minutes determines whether you end up with a manageable repair or thousands of pounds of structural damage.

Most people know to call a plumber. But the call alone is not enough — there are things you should do immediately while you wait for the engineer to arrive. These four steps can make a significant difference to the outcome.

Step 1: Turn Off the Water at the Stopcock

This is the single most important thing you can do. The stopcock — sometimes called the stop valve — is the main shut-off for your water supply. Turning it off stops water flowing to the burst pipe and limits how much damage occurs.

If you cannot locate the internal stopcock, or if it is stuck and will not turn, there is an external stopcock in the pavement outside your property. This is operated with a long-handled stopcock key (sometimes called a buffalo box key), which you can buy for a few pounds from a hardware shop. If you do not have one, call your water supplier — they can send someone out to turn it off from the street.

Once the water is off, open the cold taps around the property to drain down what is already in the pipes. This reduces the pressure on the burst section and gets the water out of the system faster.

Step 2: Drain the System and Catch What You Can

With the stopcock off, there is still water in the pipes — gravity will bring it down. The goal now is to get it out in a controlled way rather than letting it leak from the burst.

If you have a cold water storage tank in the loft (common in older UK properties), that tank will continue to feed water into the system even after the mains stopcock is off. To stop this, you need to tie off or jam the ball valve in the tank — or, if the tank has its own shut-off valve, turn that off too.

Modern properties with a combi boiler do not have a storage tank, so turning off the mains stopcock is sufficient.

Step 3: Call an Emergency Plumber

A burst pipe is not a job for DIY or for waiting until morning. Call an emergency plumber immediately. The sooner a qualified engineer can inspect and repair the pipe, the less secondary damage occurs — and the faster your water supply is restored.

Be cautious of companies that quote very high call-out fees upfront without giving you a clear breakdown. Most reputable local plumbers will give you a fixed quote before starting work. You should not be hit with a surprise bill after the fact.

If you are in Slough or Berkshire, Manako Plumbing offers same-day emergency response. We will give you a fixed price before we start — no hidden charges, no surprises.

Step 4: Document the Damage for Insurance

While you are waiting for the plumber and the immediate situation is under control, take photographs and video. Most home insurance policies cover burst pipe damage — but you will need evidence of the damage before any repairs or clean-up begin.

If you have already cleaned up and the engineer has repaired the pipe, ask them to provide a written report of what they found and what work was done. This is useful evidence for the insurance claim.

What Causes a Burst Pipe?

Understanding the cause helps you prevent it happening again. The most common causes of burst pipes in UK homes are:

• Freezing temperatures: When water freezes inside a pipe, it expands and cracks the pipe. Uninsulated pipes in lofts, garages, and external walls are particularly vulnerable in cold weather.
• Corrosion: Older copper or steel pipes deteriorate over time. Corrosion weakens the pipe wall until it fails — often at a joint or elbow.
• High water pressure: Unusually high mains pressure can stress pipes and joints over time, eventually causing them to give way. A pressure regulator can be fitted if this is a recurring issue.
• Physical damage: Pipes accidentally drilled through, knocked, or disturbed during building work or renovation. Always check for pipes before drilling into walls or floors.
• Age and fatigue: Pipes installed decades ago may simply have reached the end of their serviceable life. A leak at one point in an old system is often a warning that other sections are also near failure.

Emergency burst pipe repairs carried out by Manako Plumbing in Slough and Berkshire.

Preventing Burst Pipes

You cannot prevent all pipe failures, but you can significantly reduce the risk:

Insulate loft and external pipes

Pipe lagging is inexpensive and available from any hardware shop. Any pipe in an unheated space — loft, garage, under floorboards near an exterior wall — should be insulated before winter. Pay particular attention to the pipes near the cold water storage tank if your property has one.

Know where your stopcock is

Everyone in the household should know where the stopcock is and how to turn it off. If it has not been turned in years, give it a quarter turn to make sure it still works — seized stopcocks are common and can be replaced before they are needed in an emergency.

Keep the heating on in cold snaps

During very cold weather, do not turn the heating off completely overnight. A low background temperature — around 12-15°C — is usually enough to prevent pipes freezing. This is especially important in properties that are empty for extended periods.

Get a plumbing inspection if your property is older

If your home was built before the 1980s and the plumbing has never been updated, a survey from a qualified plumber can identify pipes that are at risk before they fail. It is a small cost against the alternative of emergency repairs and insurance claims.

How Much Does a Burst Pipe Repair Cost?

The cost of a burst pipe repair depends on where the pipe is, how much of it needs replacing, and what caused the failure. As a general guide:

• Simple pipe repair (accessible location): £150-£300
• Pipe repair requiring access works (under floorboards, behind a wall): £300-£600+
• Emergency call-out charge: Variable — always get a fixed quote before work begins
• Secondary damage (drying out, redecoration): Usually covered by home insurance if the leak was sudden and accidental

Get a written fixed quote before any work starts. A reputable plumber will tell you exactly what the job involves and what it will cost before they begin.