Central Heating Power Flushing

A Power Flush sends a special cleaning solution through your central heating system under high pressure, clearing the harmful sludge which builds up over time as a result of the reaction between water and steel radiators.

Power Flush revitalises older central heating systems and is definitely worth the investment when installing a new boiler to maximise its performance. Performing a Power Flush could be the answer if your central heating system is slow to start up, has frequent pump failure or ‘kettling’ noises emanate from your boiler.

Other symptoms indicating your system has circulation problems are radiators needing frequent bleeding, radiator water dirty and discoloured or some radiators partially or completely cold. All of these could result in corrosion and the formation of rust, sludge and scaling.
Ensure maximum efficiency from your boiler

90% of all system boiler failures can be attributed to corrosion. A Power Flush will ensure maximum efficiency from your boiler, curing flow and circulation problems, restoring heat output to radiators, reducing boiler kettling and restoring system efficiency which can possibly lead to reduced bills.

A Power Flush is often a requirement to extend boiler warranties and by providers of Central Heating Insurance Cover.Prices start at £325.00 including VAT, quotations are based on type and age of boiler, system in use and number of radiators.

What Is Done During a Home Heating Power Flush?

Using a specialised machine, a chemical is circulated through your radiators, pipes and boiler at a high pressure. This flushes out any potentially inhibiting deposits and thus allows water to flow freely throughout your system.

How Long Does A Power Flush Take For Central Heating Systems?

The duration for a Power Flush will depend on the size, age and condition of your home heating system. Usually, a Power Flush can take between 6 and 8 hours to complete. For larger or more complex heating systems it would normally take between 1 and 2 days to finish.

Powerflush Benefits

It’s all well and good knowing what a power flush does, but are there any advantages of regular power flushing? Below are some of the benefits of having your heating system power flushed by a plumber or heating engineer.

  • Enhanced energy-efficiency
  • Improved system reliability
  • Potentially lower energy bills
  • Reduced likeliness of boiler breakdown
  • Could increase system life span
  • Radiators can warm up quicker
  • Better quality of heating and hot water
  • Reduced noise from boiler and radiators

When Should A Power Flush Be Considered?

Power flushing is required when the system is heavily contaminated. This can be caused by a number of factors including incorrect installation, the system not being thoroughly cleaned before installation or a build up of bacteria.

If you’re considering upgrading and having a new boiler installed, then the UK building regulations suggest that a system cleanse is performed before the boiler installation. This can be different from a simple system flush with clean water versus a powerful Power Flush that hasn’t been properly maintained. Having a power flush done before you replace your boiler will help prevent your replacement boiler being coated in debris or sludge from your previous system.

Signs That Your System Needs Power Flushing

Below is a list of things to keep an eye on. These will help you to work out if your home heating system needs a Power Flush service.

  • Cold spots on your radiators, particularly at the bottom
  • The radiators require constant bleeding
  • Noisy radiators and boiler
  • Radiator leaks
  • Frequent breakdowns
  • Boiler constantly needs to be restarted
  • Central heating takes a long time to heat up
  • Some radiators struggle to heat up more than others
  • Discoloured water when radiators are bled
  • Cold radiators but hot pipes

Who Should Perform A Powerflush?

You should always ensure that a professional carries out any work on your central heating system. You should make sure you contact a Gas Safe Heating Specialist with good online reviews to ensure the work is done to a professional standard.

“A mistake could make your heating system perform worse than what it did before”

It is illegal for anyone to do work on a heating system if they are not Gas Safe Registered with relevant qualifications. Always ask to see their Gas Safe card before letting them work on your home central heating.

There are no rules stating that you must be Gas Safe registered to perform a system Powerflush, you must be competent and able to complete the job properly. A mistake could make your heating system perform worse than what it did before and there are risks in using the specialised chemicals. We therefore recommend seeking the help of a professional.

We have a number of local expert engineers that are skilled in performing Power Flushes. You could get in touch today to help diagnose whether your system requires a Powerflush and to book an appointment.

Frequently Asked Questions

How Does Power Flushing Work?

When you power flush your system water is pumped in numerous directions. This helps to remove particles and and slugs from the radiators so they can be drained. To ensure the efficient breakdown of sludge during the cleaning process we use special chemicals to help breakdown large deposits.

Will Power Flushing Get Rid of Sludge And Debris?

No. It will remove a good proportion of it, but it cannot remove all the sludge in the system. If your system is very old or very-heavily silted up, then power flushing may not be sufficient to remedy the problem. If you have a gas combi-boiler, then you may want to ask your engineer to remove the hot water heat exchanger, flush that separately on both sides as well, to remove any limescale build up, before refitting it into the combi-boiler.

Will Power Flushing Solve All Heating Problems?

Unfortunately the short answer is no. If there is a broken part in your boiler, or elsewhere in your central-heating system, power flushing will not fix it. Power flushing can improve the efficiency of your system and keep it running effectively but it cannot mend valves that have broken as a result of sludge in the system, for example.

Equally, power flushing is not the solution to pressure loss. That usually indicates a leak in the system – again this may have occurred due to inefficient running, but the power flushing will not solve the problem by itself.

Power flushing works best if it is carried out regularly from when a system is new. If you have an older boiler or residential heating system that is older than 10 years, then its unlikely that a power flush will do much to improve efficiency. In this scenario it would be more cost-effective to replace or upgrade your boiler, radiators and possibly some of the existing pipework.

How Much Does Power Flushing Cost?

Prices for a central heating Powerflush will depend on the size, age and condition of your heating system along with any special requirements to complete the job. The cost of a heating power flush in the UK starts at £350. This may seem like a costly expense, however you will see potential savings thanks to you having a more efficient system. The power flush could also help prevent an expensive breakdown in the future.