I have found the filling loop to re-pressurise my bolier. However, when I turn the black tap as shown in the following link, nothing happens.
http://www.toolstation.com/images/library/stock/webbig/35419.jpg
Do I need to tuen the valve on the other end of the filling loop..
http://www.toolstation.com/images/library/stock/webbig/35419.jpg
Do I need to tuen the valve on the other end of the filling loop..