If your radiators are not working properly and you find that there are cold spots in the middle and at the bottom of your radiator then you most likely have sludge in your radiators and the best way to remove this and prevent further damage is to power flush your central heating system.
This radiator sludge is a mixture of rust and dirty water most likely to happen to systems over 10 years old and in worst case scenarios can also damage your pump, boiler and valves, so it’s important to get this fixed.
What is power flushing?
Power flushing is basically a method of attaching a flushing unit to your central heating system which sends a powerful flow of fresh clean water through your whole system which removes the sludge and leaves you with a system full of clean fresh pH neutral water which reduces the risk of future damage to your system. This flow is sent at high velocity but low pressure meaning there is no damage done to your pipework. Chemicals will also be added to this stream which help loosen corrosion and hard deposits.
There is no need to remove radiators and the only mess is from the outflow pipe so this is an easier method than removing and flushing single radiators and will only take around 4-5 hours to complete.
It is also useful to get a corrosion inhibitor added to your system at this time which will help prevent the build-up of sludge in the future.
How much does a power flush cost?
This is not something you can do yourself and so you will need to hire a heating and plumbing engineer to power flush the system for you and this will set you back around £275-350 but as with hiring any tradesmen prices and services can vary so do your homework.
Power flushing will increase the efficiency of your heating meaning lower energy costs whilst also doing your bit for the environment so it is definitely money well spent and engineers recommend flushing your system regularly every 5 years to keep the system in tip top condition.