What is a Power Flush?

A Power Flush is a cleansing process which aims to remove deposits of sludge, rust and any other debris from your Hydronic Heating system.

Power flushing is the most efficient and effective method of cleansing a hydronic central heating system. The principle is to create a powerful fresh water flow under controlled conditions to remove debris from the system. By connecting the power flushing unit to the heating circuit in place of the system pump, boiler or radiator the circuit can be thoroughly cleansed of limescale and corrosion debris.

How often does My System need a Power Flush?

If you carry out regular servicing and maintenance (professional servicing is recommended annually) then a preventative Power Flush should only be necessary every 5-6 years to clear debris and prevent significant blockages from taking hold.

However, this will vary depending on the system you have. For example, some boilers use copper heat exchangers rather than stainless steel which will corrode quicker.

IMPORTANT: If you are planning to replace your boiler it’s important that your installer performs a Power Flush before the installation. Otherwise, you risk contaminating the new boiler with damaging sludge and debris that’s hanging around in the old pipework.

Signs you need a Power  Flush

There are signs to look out for that suggest that all is not well in your central heating system:

  • Cold areas on radiators e.g. at the bottom
  • Excessive noise from the boiler or the heating system pump
  • Discoloured water when you bleed the radiators
  • Heating is slow to warm up
  • Some radiators struggle to heat up as well as others
  • Radiators cold but pipes are hot
  • Boiler regularly shuts down and needs restarting
  • No water escapes when you bleed a radiator
  • Noisy radiators and or / boiler
  • Small leaks in radiators.

What are the benefits of a Power Flush?

  • Faster Heat Up Times
  • Hotter Radiators
  • Quieter Boiler and Radiators
  • More energy efficient system = lower energy bills
  • More reliable i.e. less chance of breakdown
  • Increase the life of your heating system
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Thermal image showing sludge build up
Thermal image showing sludge build up.

How does a Power Flush work?

A specially designed pump is connected to you Hydronic System ( Radiators or Underfloor ). This pump will push special chemicals through the pipes, boiler and radiators in both directions dislodging and removing contaminants. The chemicals are designed to remove sludge  and rust and they include a dDescaler to remove limescale and a Corrosion Inhibitor to help prevent future rust from forming.

We should be able to measure the temperature of your radiators before we start work and then show you the improvement after the Power Flush. The whole process can last anything from 6 – 10 hours depending on factors such as the number of radiators in your home ( or the amount of underfloor piping ) and the age.

Can you perform a Power Flush without a professional?

Not Recommended !!

While there may be  Power Flushing kits for hire and instructional videos available on the internet, it’s a risky and complicated job. A professional will make a Power Flush look easy, clean and safe but the reality is it’s a job that has the potential to get very messy. Specialist chemicals and equipment should only be handled by those trained to do so.It’s also possible that carrying out the work on your heating system by yourself may invalidate any manufacturer’s warranty you have.

How Much Does it Cost ?

There are lots of factors that will affect the price of a Power Flush such as size and complexity of the heating system, not to mention any incidental troubleshooting that crops up.

A Power Flush can cost anything between $500.00 – $1000.00 + gst but there may be additional costs to replace parts..

It is important that your central heating system is as efficient as it can be at all times and, although a Power Flush can be an expensive process, it can also save a lot of money over time in reduced heating bills.

radiator repair and service