Why do pipes burst?

What causes pipes to burst?

What Causes Pipes to Burst?

Burst pipes are one of the most damaging plumbing emergencies a homeowner can face. While a number of factors can contribute to a pipe failure, there are four primary causes that are most commonly to blame:

• Freezing Temperatures

• Pipe Movement

• Excessive Water Pressure

• Corrosion

Let’s take a closer look at these causes—and what to do if it happens in your home

1. Freezing Weather

In cold conditions, the water inside your pipes can freeze. While most materials shrink in the cold, ice actually expands. This expansion increases pressure within the pipe. If the pressure becomes too great, it can rupture the pipe—often at a weak joint or even directly through the pipe wall. This is one of the most common causes of wintertime plumbing disasters.

2. Pipe Movement (Water Hammer)

Have you ever heard loud banging or clanging sounds when turning your taps on or off? That’s called a water hammer. It happens when unanchored pipes move abruptly due to a sudden change in water flow. Over time, this constant movement can stress and weaken pipe joints until one finally gives way, releasing high-pressure water and causing major damage.

3. High Water Pressure

Your plumbing is designed to handle water pressure within a safe range. If the pressure becomes too high, your pipes may not be able to withstand the force. This can lead to cracked pipes or blown fixtures, such as taps or valves. A pressure regulator can help maintain safe levels and avoid disaster.

4. Pipe Corrosion

Though plumbing systems are built to last for decades, they don’t last forever. Over time, pipes can corrode—especially if the water has an imbalanced pH or high mineral content. Corrosion gradually weakens the pipe walls, eventually leading to leaks or full-scale bursts if not addressed early.

What Should You Do If a Pipe Bursts?

A burst pipe can flood your home in minutes, so fast action is essential. At MDG Plumbing Services, we’ve been helping Sydney residents handle emergency plumbing situations—like burst pipes—for over a decade. We’re available 24/7 and offer rapid-response service to minimise damage and get your water flowing safely again.

If you suspect or discover a burst pipe, don’t wait—give us a call right away and let our experienced team take care of it!