If your pipe bursts, immediately turn off your main water supply, switch off electricity if water is near electrical systems, protect your belongings, and contact an emergency plumber. Acting quickly can significantly reduce water damage and repair costs.

If your water bill has suddenly increased without a change in your household’s water usage, there is usually an underlying cause that needs attention. The most common reasons include hidden leaks, running toilets, leaking irrigation systems, faulty plumbing fixtures, and underground pipe leaks.

In many cases, a sudden increase in your water bill is the first warning sign of a plumbing problem that may not yet be visible.

The good news? Identifying the cause early can save you hundreds or even thousands of rands in wasted water and future repairs.

1. Hidden Water Leaks

One of the most common causes of a high water bill is a hidden water leak.

Unlike a burst pipe, hidden leaks can continue unnoticed for weeks or months while silently wasting water.

Common locations include:

• Behind walls
• Under floors
• Underground water pipes
• Roof spaces
• Inside ceilings

Signs of a hidden leak include:

• Damp patches
• Mould growth
• Peeling paint
• Low water pressure
• Constant sound of running water

Professional leak detection can identify these leaks without unnecessary digging or wall damage.

2. A Running Toilet

A toilet that continuously runs can waste thousands of litres of water every month.

Often the problem is caused by:

• Worn flapper valves
• Faulty fill valves
• Incorrect float settings

Many homeowners don’t realise their toilet is running because the water loss happens gradually throughout the day.

A simple toilet repair can often solve the issue and significantly reduce your water bill.

3. Underground Pipe Leaks

Underground water leaks are particularly difficult to detect because they occur out of sight.

These leaks can develop due to:

• Ageing pipes
• Ground movement
• Corrosion
• High water pressure

Warning signs include:

• Wet patches in the garden
• Unusually green grass
• Sinking soil
• Higher water bills

Leak detection equipment such as acoustic testing and pressure testing can accurately locate underground leaks.

4. Irrigation System Leaks

Sprinkler systems and irrigation lines are frequently overlooked.

A small leak in an irrigation pipe can waste significant amounts of water every day.

Inspect your irrigation system regularly for:

• Broken sprinkler heads
• Constantly wet areas
• Pooling water
• Damaged piping

5. Dripping Taps and Fixtures

A dripping tap may seem insignificant, but over time it can waste hundreds of litres of water.

Common causes include:

• Worn washers
• Damaged cartridges
• Faulty seals

While the cost of a dripping tap may seem small initially, multiple leaking fixtures can contribute to a noticeably higher water bill.

6. Faulty Pressure Reducing Valves

Many homes use Pressure Reducing Valves (PRVs) to regulate incoming water pressure.

When a PRV fails, excessive pressure can:

• Increase water consumption
• Damage plumbing fixtures
• Cause hidden leaks
• Reduce the lifespan of pipes

If you notice unusually strong water flow, a plumbing inspection may be worthwhile.

7. Changes in Household Usage

Sometimes the increase is not caused by a plumbing fault.

Consider whether any of the following have changed:

• More people living in the home
• Increased garden watering
• Filling a swimming pool
• Additional appliance usage
• Holiday guests

If your usage habits have remained the same, a plumbing issue is far more likely.

How to Check for a Hidden Water Leak

A simple water meter test can help identify hidden leaks.

Step 1

Turn off all taps, appliances, and water-using fixtures.

Step 2

Locate your water meter and record the reading.

Step 3

Avoid using any water for 30 to 60 minutes.

Step 4

Check the meter again.

If the reading has changed, there is a strong possibility that water is escaping somewhere within the plumbing system.

When Should You Call a Plumber?

You should contact a professional plumber if:

• Your water bill increases suddenly
• You suspect a hidden leak
• Your water meter continues running when no water is being used
• You notice damp walls or ceilings
• You experience unexplained low water pressure

Professional leak detection can quickly identify the source of the problem and prevent further damage.

Expert Advice from K-Plumbing

Many customers only discover hidden leaks after receiving an unusually high water bill.

The earlier a leak is found, the less damage it can cause.

At K-Plumbing, we use professional leak detection equipment to locate hidden leaks accurately and efficiently, helping homeowners avoid unnecessary water loss and costly repairs.

If your water bill has increased unexpectedly, don’t ignore the warning signs.