I have a ariston a1637, the fill valve has broken. I have got a replacement part but the new one only has two valves while the old one has three valves, obviousley this leaves one set of cable spare, any help on how to get round this would be great.(the part has been confirmed as correct but modified, however ariston will only offer to send someone around,they wont tell me how to fit?!)

chris, July 2010