Recent content by 5898jim

Thanks DH I was going to flush out the X400 before adding the other solutions - I'm just a bit concerned I didn't get enough of the X400 in the system to do any good. Jim

Just over a year ago I switched from an open-vented central heating system to a sealed system when I had a new Vaillant Ecotec Plus 618 boiler installed in my home. However, I kept the existing 7 radiators. When I had the boiler serviced for the first time 2 weeks ago the engineer told me that...