At Vankero we understand the importance of keeping your heating efficient and boiler maintained. Our engineers are trained and qualified to improve and repair any heating issues that may occur unexpectedly.

What is a Powerflush?
A powerflush is a cleansing process which aims to remove deposits of sludge, rust and any other debris from your central heating system. These contaminants, if left, can seriously affect the efficiency of a heating system meaning expensive calls outs, expensive parts and even sometimes a whole new heating system.

Over time the water in your pipes, boiler and radiators deposits unwanted by-products like rust. This rust (plus other dirt and debris) becomes an unpleasant, mud-like substance that professionals affectionately refer to as ‘sludge’. Sludge in your heating system can cause to blockages and corrosion which will lead to both inefficiency and / or breakdown.

How often do you need a Powerflush?
If you carry out regular servicing and maintenance (professional servicing is recommended annually) then a preventative powerflush should only be necessary every 3-5 years to clear debris and prevent significant blockages from taking hold. However, this does vary depending on the system you have. For example, some boilers use copper heat exchangers, rather than stainless steel, which will corrode quicker.

How do I know if I need a Powerflush?
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
Cloudy tap water (limescale in system)
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.

IMPORTANT: If you are planning to replace your boiler it’s important that the engineer performs a powerflush before the installation. Otherwise, you risk contaminating the new boiler with damaging sludge and debris that’s hanging around in the old pipework. Which will make your warranty void

What are the benefits of a Powerflush?
No more cold spots or cold radiators
Radiators will get hotter and heat up quicker
Quieter boiler / radiators
System more energy efficient – savings of up to 30% on energy bills
Higher hot water temperatures
Prevents further corrosion
Increases the life of the boiler, pump, valves, radiators and pipework

While a powerflush may be all that is required to get your heating back on track, unfortunately it is not always that simple. A system may be so damaged that it is actually cheaper to replace rather than repair. If this is the case, we will always inform you and advise you on the most efficient and cost-effective solution.

How does a Powerflush work?
An engineer will connect a pump to your central heating system. If it’s a Combi it will be connected at the pump head but if it’s a system boiler it will be connected at the circulation pump. This pump will push industry selected chemicals through the pipes, boiler and radiators.

This includes a chemical that will remove sludge and rust, a descaler to remove limescale and a corrosion inhibitor to help prevent future rust from forming.

The whole process can last anything from 4 – 10 hours depending on the number of radiators in your home, the age of the system and the severity of the sludge in the system. The engineer may find more problems than originally anticipated such as needing new parts to replace those that have been damaged beyond repair.

Most powerflush jobs can be completed in one day but some of the more severe cases may require longer.

How much will a Powerflush cost?
There are lots of factors that will affect the price of a powerflush such as size and complexity of the heating system, not to mention any incidental troubleshooting that crops up. A powerflush can cost anything between £200 to £1000+. Sometimes there will be additional costs like extra descaler chemicals or replacement of TRVs.

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

Is a Powerflush always the solution?
In some particularly severe cases you may find it is actually more cost effective to replace the system than carry out a powerflush. A powerflush will not fix broken parts. If a blockage has caused a part to break that will add time and cost to the job to get the system back to optimum performance. A professional will be able to advise you if this is the case.

Why Choose Us

Fully qualified Gas Safe engineers
Over 12 years of powerflushing experience
Flexible appointment times
Competitive prices

To book an appointment today, call us on 0207 11 88 99 0 or email and a member of our team will be happy to assist.

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