A burst geyser is one of the most stressful things that can happen at home. Hot water pours through the ceiling, the power trips and you are not sure what to switch off first. This guide tells you exactly what to do in the first few minutes, how to spot a geyser that is about to fail, and when a repair is no longer enough.
Burst Geyser: What to Do Right Now
Stay calm and work through these steps in order. Doing them fast limits the damage to your ceiling, floors and furniture.
- 1Switch off the geyser power
Go to your DB board and switch off the geyser breaker. It is often marked “geyser”. If the DB board is wet, do not touch it. - 2Close the water to the geyser
Close the cold water valve on the pipe going into the geyser. If you cannot reach it, close the main water valve at your meter. - 3Open a hot tap
Open a hot water tap in the kitchen or bathroom. This lets the pressure out of the system and slows the leak. - 4Protect the room below
Put buckets under the water and move furniture, beds and electronics out of the way. - 5Stay out from under the ceiling
Do not stand under a ceiling that bulges or sags. Wet ceiling boards can fall without warning. - 6Take photos
Photograph the geyser, the ceiling and any damage. Your insurer will want these. - 7Call your insurer and a plumber
Report the burst geyser to your insurer, then book a plumber to make it safe and quote the repair.
Signs of a Geyser Burst or a Geyser About to Fail
Most geysers give some warning before they burst. If you see any of these, have your geyser checked soon.
Water from the ceiling
A damp patch or drip in the ceiling near where the geyser sits.
Constant overflow drip
The overflow pipe outside drips all day, not only while the water heats up.
Rusty hot water
Brown or rusty water from the hot tap only, a sign the tank is rusting inside.
Strange noises
Banging, popping or hissing from the geyser when it heats.
No hot water or tripping
Lukewarm water, no hot water at all, or the geyser breaker that keeps tripping.
Higher power bills
A geyser that runs much longer than before can point to a faulty thermostat or element.
Why a Geyser Bursts
Knowing the cause helps you avoid the next burst geyser. These are the usual reasons.
- Age and rust. The steel tank rusts slowly from the inside. Once the protective anode is used up, rust speeds up.
- High water pressure. A faulty pressure control valve lets too much pressure into the tank.
- A faulty thermostat. If the thermostat sticks, the water overheats and pressure builds up.
- Power surges. Surges when the power comes back after load-shedding can damage thermostats and elements.
- Poor installation. Missing valves, no drip tray or a badly supported geyser all add risk.
Our team handles geyser repairs, servicing and new geyser installation across Cape Town. Free quotes.
Get a free quoteCall 076 272 8280Burst Geyser Repair or Geyser Replacement?
Not every geyser problem means a new geyser. If the tank itself is sound, many parts can be replaced. If the tank has burst, it must be replaced.
| Problem | Usually | Why |
|---|---|---|
| Element has failed | Repair | The element can be swapped without replacing the tank. |
| Thermostat faulty | Repair | A new thermostat is a quick, common fix. |
| Pressure valve dripping | Repair | Valves wear out and can be replaced. |
| Tank leaking or burst | Replace | A split or rusted tank cannot be repaired safely. |
| Old geyser with rusty water | Replace soon | Rust inside means the tank is near the end of its life. |
If your geyser is old and has already needed a few repairs, replacing it before it bursts is often cheaper than dealing with a flooded ceiling later.
A geyser replacement is also a good time to think about solar water heating or a heat pump. Both cost more up front but use less power.
Geyser replacement cost: a rough guide
As a rough guide, replacing a standard 150 litre electric geyser in Cape Town, with the new valves and fittings, often costs about R9,000 to R16,000. Bigger geysers, hard access in the roof or extra pipe work cost more.
Prices vary from home to home, and ceiling repairs are extra. Always get a quote based on your own geyser and roof.
What a Proper Geyser Installation Includes
A burst geyser is a chance to fix what was wrong with the old setup. A good geyser installation should include these parts.
- A drip tray under the geyser, with a drain pipe that runs outside.
- A pressure control valve on the cold water supply.
- Vacuum breakers to protect the tank.
- Overflow pipes that run safely to the outside of the house.
- A safe electrical connection and isolator for the geyser.
- Strong supports so the full tank sits securely in the roof.
Geyser installations in South Africa must follow the national standard. Your insurer may also ask for a plumbing certificate of compliance. The Plumbing Industry Registration Board explains how plumbing compliance works, so check what your insurer needs before work starts.
Insurance and Ceiling Damage After a Burst Geyser
Call your insurer as soon as the water is off. Many insurers want to approve the work, or send an assessor, before the new geyser goes in. Keep the old geyser and your photos until they say otherwise.
The ceiling under a burst geyser often needs work too. Wet ceiling boards sag and stain, and some must be replaced. We can do the ceiling repairs once the roof space has dried out.
Not sure if the water came from the geyser or the roof? Our guide to roof leak repair shows you how to tell the two apart.
How to Lower the Risk of Another Burst Geyser
A few simple habits keep your geyser healthy for longer.
- Look at the drip tray and overflow pipes every few months for water or rust.
- Have the geyser serviced every few years, including the anode and the valves.
- Set the thermostat to a safe, sensible temperature instead of the highest setting.
- Fit surge protection at the DB board to protect the thermostat and element from power surges.
- Plan a replacement when the geyser gets old, instead of waiting for it to burst.
Our plumbing services cover leaks, blocked drains, taps, toilets and geysers. We also handle the electrical side, like element replacement and surge protection. If you are looking for a plumber in Cape Town for a geyser job, give us a call.
Call us Mon to Fri 08:00 to 17:00 or Sat 08:00 to 15:00. We work across Cape Town and the Western Cape.
Get a free quoteCall 076 272 8280Tell us the size and age of your geyser and where it sits, and get a free quote for a repair or a new geyser installation.
