Prevent your radiators from rusting
A lot of heating systems don’t have an inhibitor added to them, even in new houses this can often be left out
The inhibitor is a very important additive as it prevents the radiators rusting from the inside out,
To Check. Open the bleeding valve on the top of the radiator, let any air out when the water comes it should be coloured, (usually red or green) if it is not or it is dirty you need to add the inhibitor.
The best way to make sure it gets through
the system is to drain the system and add the required amount when refilling it. Inhibitor can be purchased in all plumbers’ merchants and most DIY stores.