Once the system has been cleaned, it is important to ensure that the corrosion processes which caused internal deposits to form and accumulate do not re-occur. Left untreated, internal corrosion can again lead to sludge formation, which will cause reduction of water flow and reduced system efficiency.  The system water content must therefore be treated with a chemical "inhibitor" to minimise corrosion of the various metals within the system.

It is important to ensure that the inhibitor used is compatible with the metals and other materials present in the heating system - as specified in accompanying instructions. It is also important to ensure that the product is Buildcert approved (or equivalent).

WT chemicals such as inhibitors for "open vented" heating systems are usually added to the system via the header tank in the loft. For unvented/sealed systems, WT products are often sold in containers which attach to "mastic guns", as used for bathroom filler/sealant products - although other product types are available. These allow the WT product to be introduced via an appropriate connection to the sealed heating system - following the instructions provided by the manufacturer.

Lack of water treatment, particularly in hard water areas, can also lead to formation of limescale in the boiler's heat exchanger, which can lead to reduced efficiency and boiler noise. Most inhibitors will contain ingredients to prevent limescale formation.

The final step in our process is maintenance, ensuring that the protective measures we have implemented are working to provide you long-lasting comfort.

Find out how we clean and flush your central heating blockage away.

Find out how we ensure that your central heating remains safe and effective.