​Power flushing - cleaning inside your system​

​Improve the efficiency of your heating and reduce your fuel bills with a Full system powerflush

​Do you need a Power Flush?

Do your radiators have cold spots?

​This is normally a sign of sludge build-up.

Over time the water in your heating system attacks the inside of you radiators, pipework and even to a small degree, your boiler.

This sludge travels round your system suspended in the water until it eventually finds a place to settle. Normally at the bottom of your radiators where the flow of water is slowest.

This sludge builds up over time and accumulates meaning that when your heating is on, the hot water cannot reach the parts of your radiators where the sludge has settled.

That part of the radiator then doesn't warm up except by the transfer of heat from the rest of the panel, causing a cold area in your radiator.

This means your radiator is less efficient and therefore cannot heat the room as quickly or in bad cases, such as cold days or nights, the room well not get up to its designed temperature.

Is your Home taking longer to warm up?

If you have radiators with deposits of sludge as described above, the radiators are less efficient.

Each radiator has a designed output and is sized to match your rooms heat requirement. If the radiators cannot give out as much heat as designed, the room takes longer to warm up and sometimes doesn't actually get to the desired temperature.​

Are some radiators not as warm as others?

​If you have sludge in your system it will naturally collect in the radiators with the slowest flow of water.

This means that some radiators have more sludge than others and therefore do not work as well as other radiators in your home.

This results in some rooms not getting warm enough or taking longer to get warm initially.

What is a Power Flush?

​A full system powerflush involves using a powerflushing machine to circulate a mixture of hot water and cleaning chemicals around your heating system at high speeds (not high pressure).

​Often, the chemicals are added to the system a few days before the actual powerflush to help loosen the sludge.

​During the powerflush, individual radiators can be isolated and, using a special drill attachment, "hammered" to release any stubborn sludge.

The hot water and chemicals break down the compacted sludge and scale into small enough particles to be suspended in the circulating mixture.

A filter may also be sued to extract the particles as they travel around the system rather than waiting to flush them all at the end.

At the end of the cleaning process, the system is flushed through with fresh clean water to remove any particles and chemicals.

Then wehn the system is refilled, an inhibitor chemical is added to prevent the creation of sludge in the future.

Why have a Power Flush?

​There a number of reasons to have a powerflush, the biggest being if there is an existing problem that powerflushing can fix but some benefits include:

  • ​Reduces your energy bill
  • Improved boiler performance and expected lifespan
  • Improved pump performance and expected lifespan
  • Improved comfort levels in your home
  • Can cure noisy boilers and system noise

​​If there is no immediate issue then powerflushing a system may not be the best idea although all boiler manufacturers recommend carrying out a proper powerflush when installing a new boiler.

​Contact us now 24/7 for power flush advice or to book a visit

​When a power Flush is not always the best solution.

​Although Power Flushes are put forward as the answer to many heating problems, they are not always the correct process to fix a specific issue.

​Below are few examples of situations that will not be fixed by a Power Flush:

Radiators which are cold at the top

If your radiators are cold at the top and warm at the bottom that means you have air in the panel.

To remove the air you will need to bleed the radiator. With a radiator bleed vent key open the vent and let the air out.

Remember to have a small towel or kitchen roll handy as you will know when the air is fully bled as water will come out of the hole.

Be careful as if the heating has been on the water will be very hot.

Repeat this for any other radiators that are cold at the top.

This air can be caused by a reactions in the system so you should ask for an additive to be added during your next service.

Parts of a system that do not get warm

​Just like unbalanced systems if part of your system never gets warm or takes longer than the rest of the system this could mean you have a small pipe blockage or the system needs balancing.

IN both cases, you will need an experienced heating engineer to inspect your heating and either balance the system or fix the minor blockage (cutting out and replacing the blocked pipework.

Unbalanced systems

​If a part of your heating system never seems to get warm, you may need your system balanced.

This involves working round the system to restrict the flow of water into some radiators to force it to flow to the ones that are not getting warm.

It may also be an indication of a weak pump or blockage so should be looked at by an experienced heating engineer.

Severe pipe blockages

​Unlike unbalanced or poor performing systems, severe pipe blockages can stop sections of your heating system from getting warm or even affect the whole system.

​A powerflush may help but in a lot of cases, the quickest and most cost effective solution is to identify the are of pipework that is blocked and cut our and replace that pipework.

An experienced heating engineer will be able to advise on the best course of action which may also include a powerflush if the rest of the system is also showing problems.

​But, not all Power Flushes are equal!

​Although a true Power Flush involves chemicals, a Powerflushing machine and time, some companies take shortcuts which are not as effective as a proper Power Flush. There are two alternatives to Power Flushing:

​A Cold Flush

A cold flush involves flushing fresh water through a heating system.

It has its uses but when dealing with sludge and scale, this will not do anything.

It is often used to clear out solder and flux residue on new systems but for existing systems it has no effect.

​A Hot Flush

​A hot flush is similar to a cold flush but uses hot water.

The theory behind this is that the hot water will help loosen and remove some sludge without having to use chemicals.

This rarely works and for the added effort involved in heating the water there is no extra benefit except for the reduced cost of not using a Powerflush machine or chemicals.

​Contact us now 24/7 for power flush advice or to book a visit

​Just some of the Areas we cover


  • ​Richmond
  • Twickenham
  • Chiswick
  • ​Osterley
  • Hounslow
  • Fulham
  • Wimbledon
  • Earlsfield
  • Kingston upon Thames
  • ​Hayes
  • ​New Maldon
  • ​Acton

​Don't just take our word for it, see what our customers say ...


​Highly recommended.

​I was recommended to this business by experts in the trade and I found them to be knowledgeable, well organised, prompt and good value. Artur is particularly helpful, also resourceful and a very clean and tidy operator. I am shortly to use their services again.


R Bebington

​Excellent

​I would highly recommend Artur to anybody. Over the years he has been so helpful, offered sound advice/recommendations and always completed the job promptly, neatly and with great care & knowledge. He is very reliable and trustworthy....I wouldn't trust my boiler with anyone else! Thank you Artur


​Z Blanchard

​Excellent, Speedy Service

​Excellent speedy friendly service from booking to job completed. excellent ,you are know in my diary for future work and will recommend to all friends and family


A Zefi

Overall rating :  5 / 5

​All the reviews are from our Trustpilot review page which can be found here - https://uk.trustpilot.com/review/heatcareinstallation.co.uk