Most people dont bother or actually know that you can add certain things into your central heating system to keep it clean and help to stop things like corrosion and rust inside the pipework, which leads to blockages. A good and reasonably priced way is to use something called a corrosion inhibitor, which is in liquid form and added to your system to form an anti corrosion barrier. The internal components of the system including the pipes and radiators will suffer without this kind of protection.Test Your System:To test the heating system, you should take a hot water sample via the bleed tap on one your radiators. Dagenham Plumbers can carry out this test should you not feel confident. Pour the water into a glass vessel and drop a steel nail in. Take another sample from the kitchen tap and do the same. Leave these samples for a few days, then, look and if you notice that the nail in the tap water has begun to rust, corrosion in the system has started. Should the nail in the system water remain new looking, you will not need to introduce the corrosion inhibitor. If the water from your radiator is black and muddy, this is called sludge and means that you need to treat your system.1). Secure the ballcock for the feed and expansion tank so water cant fill it. 2). Open a drain cock at a low point in the radiator pipe work and drain. 3). Introduce the chemical into the tank. Move the ballcock to partially fill the tank. This will draw the chemical into the system. A Dagenham Plumber is qualified to do this. 4). Flush the system to rid it of the chemical, finally, refill the system with water and add corrosion inhibitor. Note: Always follow the makers instructions when using cleaning and other solutions.