there'll be a small white tray under the boiler; pull it out. there'll be a smll white key on it, take it off and insert it into the filling loop below the boiler and turn it, it's a bayonet style fitting so will only go in one way. turn the small plastic screw handle next to the tap and that'll let the water in. turn it off nd remove the key, you'll get a small drop of water. check the illustrated instructions that came with the boiler or download them from the worcester website it what i've written isn't clear.
Ian, August 2009
