My word i watched the water go from black to clear every rad was done one at a time.Even the boiler got a clean through.Now a chemical is sitting or running through the system for a week,then another flush,the front room rad has never been this hot,it's lovely.So let us hope we do not get the boiler buzzing again.
View: https://youtu.be/Ew7BpFf_ZxA
View: https://youtu.be/Ew7BpFf_ZxA