Finding brown or rust-coloured water coming from the kitchen taps can be worrying, especially when it happens suddenly. Water should always run clear, so any colour change is a sign that something isn’t quite right. While brown water doesn’t always indicate a big problem, it can signal issues with pipe corrosion, sediment, or a hidden leak in the water supply. In this simple guide, we explain the most common causes of brown tap water, what to do when it happens, and when to call in professionals. 

 

What Does Brown Water Mean?

Brown or orange water usually means rust, sediment, or contamination has entered the water system. While it might look alarming, brown water is usually a clear sign that something needs attention, and the sooner it’s investigated, the easier it is to fix.

 

Rust or Sediment from Ageing Pipes

One of the most common causes of brown water is corrosion in old pipework. As pipes age, rust forms on the inside walls. When water pressure changes or the tap hasn’t been used for a while, bits of rust and sediment can break loose and mix with the water. This is especially common in older homes or properties with original pipework. Signs this may be the cause:

  • The water looks rusty for a few seconds and then clears.
  • The problem only happens at one tap.
  • The tap isn’t used very often.
  • This type of issue won’t fix itself, and the rust will only continue to build over time.

 

Issues in the Mains Water Supply

Sometimes brown water has nothing to do with the home’s plumbing at all. If there has been work on the water mains in the local area, such as a repair or burst pipe, sediment can be stirred up and pushed into surrounding homes. This type of problem often affects several homes in the street. Signs it may be a mains issue:

  • All the taps are affected.
  • Neighbours have the same problem.
  • It starts after local pipe repairs or supply disruption.

If the water mains are the cause, the colour usually clears after running the taps for a short time.

 

A Leak Drawing in Soil or Contamination

A hidden leak in the underground water supply pipe can allow dirt, soil, or rust from outside to enter the system. This is a serious issue because it indicates water is escaping, and the leak could worsen. Leaks also reduce pressure and draw sediment from the surrounding ground, causing brown water to appear, especially when taps are first switched on. You may have an underground leak if:

  • Only the cold tap is affected.
  • Water pressure has dropped.
  • Sounds like water is hissing or running with no taps on.
  • Damp patches appear in the garden or driveway.

At Absolute Leak Detection, we provide accurate leak detection to quickly and safely identify the source of the problem. Leaks are best dealt with as early as possible to prevent water damage and rising utility costs.

 

Corroded Hot Water Cylinder or Boiler Issues

If brown water only appears when the hot tap is used, the hot water system may be the source. Hot cylinders can corrode internally over time, releasing rust particles into the water. Because heat speeds up corrosion, hot-water systems usually show signs of rust sooner than cold-water supply pipes. This should be addressed promptly to avoid system failure and further contamination.

 

Sudden Pressure Changes in the System

When the water system experiences sudden pressure changes, whether from leak repairs, pipe flushing, or high household demand, sediment sitting inside pipes can be disturbed. You may see brown water briefly when:

  • Water has been turned off and back on.
  • The system has been drained.
  • A plumber has recently worked on your pipes.

This is usually temporary and should clear quickly.

 

Galvanised Pipes Breaking Down

Some older properties still have galvanised steel pipes. Over time, these pipes corrode, releasing zinc and iron particles into the water, which can cause the water to appear brown or cloudy. This isn’t just cosmetic, galvanised pipes can also cause reduced flow, leaks and contamination. For homeowners who suspect their home still contains galvanised pipes, it’s worth speaking with our experts for further advice.

 

Is Brown Water Safe to Use?

In most cases, brown water is not dangerous, but it’s best to avoid drinking or cooking with it until the cause is confirmed. Rust itself is not usually harmful, but contamination from soil, bacteria, or corroded pipes can make the water unsafe. If the colour persists after running the tap, or if you suspect a leak, it’s best to stop using the water until a specialist can investigate.

 

What to Do When You Notice Brown Water

  • Run the Taps for a Few Minutes – This helps clear out loose sediment. If the water returns to normal quickly, it may have been a temporary disturbance.
  • Check if All Taps are Affected – If it’s just the kitchen tap, the issue is likely local to that pipe. If all taps are brown, the problem may be with the mains or your supply pipe.
  • Ask Your Neighbours – If others are affected, the water authority may already be working on it.
  • Avoid Using Appliances – Dishwashers and washing machines can be damaged by sediment, so wait until the water runs clear.

 

Don’t Ignore Brown Water

Brown water coming from the kitchen taps is something no homeowner wants to see, but understanding the possible causes makes it much easier to take action. Whether it’s rust, a disturbance in the mains, or a leak pulling in debris, the key is not to ignore it. At Absolute Leak Detection, we support homeowners across Rayleigh with expert leak detection methods, water supply repairs, and reliable solutions to restore your water quality quickly. If you’re worried about brown water in your home, get in touch today. We’re here to help you keep your home safe, clean and running smoothly.