Top Causes of Burst Pipes and How to Prevent Them

MDG Plumbing Services
May 11
3 min read

A burst pipe is one of the most common plumbing emergencies faced by homeowners and businesses. Not only can it cause major water damage, but it can also lead to expensive repairs, mold growth, and disruption to your property. Understanding what causes pipes to burst can help you take preventative action before a small issue turns into a costly emergency.

At our plumbing company, we regularly attend burst pipe callouts across residential and commercial properties. Below are some of the most common causes of burst pipes and practical ways to help prevent them.

1. High Water Pressure

While strong water pressure may seem like a good thing, excessive pressure can place significant strain on your plumbing system. Over time, this constant pressure weakens pipes, joints, and fittings, increasing the risk of a burst pipe.

How to Prevent It

Have your water pressure tested by a licensed plumber. If the pressure is too high, a pressure limiting valve can be installed to protect your plumbing system and appliances.

2. Corroded or Ageing Pipes

Older properties often contain galvanised steel or ageing copper pipework that naturally deteriorates over time. Corrosion weakens the walls of the pipe, making them more susceptible to leaks and sudden bursts.

How to Prevent It

Arrange regular plumbing inspections, especially if your property is older. Replacing ageing or corroded pipework early can save you from major damage and emergency repairs later on.

3. Blocked Pipes

A severe blockage can create pressure build-up inside your plumbing system. When water cannot flow correctly, the pressure may eventually cause a pipe to crack or burst.

How to Prevent It

Avoid flushing wipes, grease, oils, sanitary products, or other non-flushable items down drains and toilets. If you notice slow drainage, gurgling sounds, or bad odors, have the issue inspected before it worsens.

4. Tree Root Intrusion

Tree roots are a major cause of underground pipe damage. Roots naturally seek moisture and can enter small cracks in sewer or stormwater pipes, eventually causing blockages, leaks, or complete pipe failure.

How to Prevent It

If you have large trees near your plumbing lines, regular CCTV drain inspections can help detect root intrusion early. In some cases, damaged sections of pipe may need repair or replacement.

5. Poor Installation or Low-Quality Materials

Incorrectly installed plumbing or the use of poor-quality materials can lead to premature pipe failure. Weak joints, improper pipe sizing, and low-grade fittings can all contribute to leaks and bursts over time.

How to Prevent It

Always use a licensed and experienced plumber for plumbing installations and repairs. Quality workmanship and materials make a significant difference in the longevity of your plumbing system.

6. Ground Movement and External Damage

Underground pipes can become damaged due to soil movement, nearby construction work, or heavy vehicles driving over buried pipework. These external forces may crack or collapse pipes without warning.

How to Prevent It

If you are planning landscaping, excavation, or construction works, ensure underground services are properly located beforehand. Avoid placing excessive weight over known pipe locations.

Signs You May Have a Burst Pipe

It is important to act quickly if you suspect a burst pipe. Some common warning signs include:

Sudden loss of water pressure
Unexplained increase in your water bill
Damp patches on walls, floors, or ceilings
Water pooling outside the property
Sounds of running water when taps are turned off
Mold or musty odors

What To Do If a Pipe Bursts

If you experience a burst pipe, the first step is to shut off your main water supply to minimise water damage. Then contact a licensed emergency plumber as soon as possible to inspect and repair the issue safely.

Need Help With a Burst Pipe?

Whether it is a leaking pipe, blocked drain, or emergency plumbing issue, our experienced team is here to help. We provide fast, reliable plumbing services and can identify the cause of the problem before it leads to further damage.