Powerflushing Explained

Powerflushing is an extremely effective method to give your boiler, radiators and pipes a deep clean. Using high velocity water at low pressures, a powerflush ensures your system can be thoroughly cleaned without compromising your pipework. The technology behind this was created in 1992 by Kamco, the current leader in Powerflushing technologies. Chemicals can be used to both speed up the Powerflushing process and prolong the overall life of the system. Of course, a powerflush doesn't guarantee that your system will last longer, in fact quite the opposite. If it's not done correctly then the actual flush can burst weak pipes and cause a lot of trouble and could end up being quite a costly ordeal. Don't worry though, plumbers know what they're doing.

Kamco Powerflushing Kit

Sludge... A Boiler's worst nightmare

From the very first day water flows through your system it starts to rust and particles begin to circulate around the entire system, this is what is referred to as sludge. This damages the boiler itself and when there's enough sludge to compact together it can end up restricting the flow of and in the worst case, completely block and possibly even burst the pipes. Eventually, if left untreated you will notice your radiators develop cold spots. This is a build-up of sludge filling parts of your radiator preventing water from circulating correctly. It starts from the bottom middle and grows up and outwards over time. This reduces the efficiency of your system leading to a potentially colder home and definitely a higher bill at the end of the month.

When push comes to shove

Powerflushing involves an extremely fast jet of water that is sent through your system at a pressure high enough to remove sludge from the pipes, radiators and boiler but low enough to keep anything from bursting or being damaged. The water is moving so quickly through your system the sludge is essentially ripped from the inside walls of the pipes and radiators. To protect your boiler the water does not enter your boiler, instead it circulates an extremely strong magnet that attracts any metallic debris stopping it from returning to the system. Any none-magnetic debris will be captured by a filter. This system behaves much like our own magnetic filters. Water containing sludge enters the magnet chamber which filters out as much as possible cleansing your system from the unwanted and harmful sludge. Once the process has been completed the chamber will be filled with most of the sludge that was once in the system. Most of the current Powerflushing machines have either a clear chamber or removable magnet where the sludge is collected so you can see how effective (or maybe ineffective?) the powerflush has been.

Powerflushing is only part of the solution

Don't be fooled. Powerflushing isn't the full solution. Once your system has been flushed you can't just forget about it again, you have to look after it. Care for it. Treat it. If you neglect it, it will neglect you and break down when you really need it to be working. Most people recommend to fit a magnetic filter once the flushing has been completed. This will filter out almost all of the sludge that is deposited over the year preventing it from building up again. During your annual service, the magnetic is removed, cleaned, reinstalled and the system is topped up with the required chemical if necessary. Our Defender and Ultimate System Filters are perfect for this! They're both available with 22mm and 26mm valves and the 550ml internal capacity means you can top your system up with the required chemicals with ease! Find out more here


- Increased central heating system lifespan
- Reduces kittling (banging noises)
- Reduces the risk of breakdowns

Warning Signs?

- Murky tap water
- Cold patches
- Noisy boiler/system
- Coloured water when you bleed radiators