What to Do When You Have a Burst Pipe — A Step-by-Step Emergency Guide

A burst pipe is one of the most stressful plumbing emergencies a homeowner can face. Water can pour at an alarming rate — a single 15mm burst pipe can release over 1,000 litres per hour. That means within minutes, your floors, walls, ceilings and furniture can sustain thousands of rands in damage.

The difference between a manageable repair and a catastrophic flood often comes down to how quickly and correctly you respond in the first few minutes. This step-by-step guide from Sandton Plumbing will walk you through exactly what to do — so you can protect your home and keep costs under control while you wait for emergency help.

Step 1: Shut Off the Main Water Supply Immediately

The single most important action you can take is to turn off your main water supply. This stops more water from entering the burst pipe and limits the damage. Do this before anything else — every second counts.

The main water shut-off valve in most Sandton homes is located at one of these locations:

• Outside the house near the boundary wall (look for a blue or black cap at ground level)
• In the garage or utility room, usually on the wall closest to the street
• Under the kitchen sink in older homes
• In the meter box near your front gate

Turn the valve clockwise (right) to close it. If you\’re struggling to turn it, use a pair of pliers. If you can\’t locate your main valve, call your municipality\’s emergency line or contact us — we can advise you over the phone while en route.

Step 2: Turn Off Your Geyser and Hot Water System

Once the main water supply is off, you need to prevent your geyser from running dry and potentially burning out the element. Go to your electrical distribution board and switch off the circuit breaker labelled \”Geyser\” or \”Water Heater\”. If you\’re unsure which breaker controls it, switch off all non-essential circuits as a precaution.

This step is especially important if the burst pipe is in the hot water circuit or near the geyser.

Step 3: Turn On All Cold Water Taps to Drain the System

Open all cold water taps in the house. This releases the remaining water pressure in the pipes, reducing the amount of water that leaks from the burst point and making the system safer to work with. Let the taps run until they stop flowing — this can take several minutes depending on how much water is stored in your pipes.

Step 4: Locate the Burst Pipe

Once the flow has reduced, try to locate the source of the burst. Look for:

• Visible water spraying or dripping from a pipe or fitting
• A bulging or discoloured section of drywall or ceiling plaster
• Water staining or wet patches on floors, walls or ceilings
• A sudden drop in water pressure that you noticed before the emergency

Be cautious when inspecting areas with standing water near electrical outlets, appliances or distribution boards. If there\’s any risk of electrical exposure, do not enter the area — call us immediately.

Step 5: Document Everything for Your Insurance Claim

Before you start cleaning up, take photos and video of all damage — the burst pipe itself, water damage to walls, floors, ceilings, and any damaged possessions. Most homeowners\’ insurance policies in South Africa cover burst pipe damage, but insurers require photographic evidence.

Note the time the burst occurred and when you discovered it. This timeline can be important for your claim.

Step 6: Begin Containing the Water Damage

While you wait for the plumber to arrive:

1. Use towels, buckets and mops to absorb and remove standing water
2. Move furniture, rugs and valuables away from the wet area
3. Open windows and doors to improve airflow and start drying
4. If the ceiling is bulging with water, carefully pierce it with a screwdriver at the lowest point to allow controlled draining — this prevents a larger ceiling collapse

Step 7: Do NOT Use These Temporary Fixes

We understand the urge to try a quick fix while waiting for a plumber — but several common \”solutions\” can make the problem significantly worse:

• Pipe repair tape on a live system: Self-fusing tape is only effective on very small leaks under low pressure. It will not hold on a burst pipe and can give a false sense of security while the leak continues inside the wall.
• Epoxy putty on wet pipes: Epoxy requires a dry, clean surface to bond effectively. Applying it to a wet, pressurised pipe usually fails within minutes.
• Reconnecting water without finding the source: Never turn the main supply back on until the burst pipe has been properly identified and repaired.

Common Causes of Burst Pipes in Sandton

Understanding why pipes burst can help you prevent future emergencies. In Sandton and the greater Johannesburg area, the most common causes include:

• Age and corrosion: Many Sandton homes have original galvanised steel or early CPVC pipes that are 20–40 years old and well past their design life.
• High water pressure: Joburg\’s municipal water pressure can be extremely high, especially in elevated areas. Pressure above 600kPa can stress and eventually burst pipes and fittings.
• Tree root intrusion: In leafy suburbs like Bryanston, Morningside and Hyde Park, tree roots frequently crack and enter underground water lines.
• Poor-quality prior repairs: DIY repairs or work done by unlicensed contractors often create weak points that fail under normal water pressure.
• Sudden temperature changes: While Johannesburg winters are relatively mild, cold snaps in June and July can cause pipes in uninsulated roof spaces to contract and crack at joints.

When to Call a Professional — and When to Call Us

For any burst pipe beyond a very minor drip from an accessible fitting, you need a licensed plumber. Burst pipe repair in South Africa must comply with SANS 10252 and your municipality\’s bylaws. Improper repairs can void your insurance, cause structural damage, and create long-term water quality issues.

Call Sandton Plumbing on 073 707 8085 if:

• Water is flowing or spraying from any pipe or fitting
• You\’ve noticed significant water staining or ceiling sagging
• Your water pressure has dropped suddenly
• You can hear running water inside walls or floors when all taps are off
• Your water bill has increased significantly without explanation

How We Respond to Burst Pipe Emergencies in Sandton

When you call us, our process is fast and transparent:

1. We answer 24/7 — you\’ll always speak to a real person
2. We dispatch the nearest available licensed plumber to your location
3. We identify the source of the burst using non-invasive detection equipment where possible
4. We provide a clear, itemised quote before any work begins
5. We complete the repair to SANS compliance standards and issue the relevant certification

For more detail on what we cover, visit our dedicated Burst Pipe Repair service page, or learn about our non-invasive Leak Detection service if you suspect a hidden leak before it becomes a full burst.