I bled some of my radiators as the top of some of them weren't working. It did the trick. However I didn''t realise you were only supposed to let the air out. I thought you were also supposed to let some water out. For some of them I let a lot of water out. Realise now I should have checked this rather basic fact beforehand! Does anyone know if this is likely to have a major impact on the radiators? They are still working just fine. Don't want to call in a plumber if I can avoid it. Thanks