Hi I have a Biasi 24s that has started to drip from the diverter valve causing a loss of pressure in CH system. at first it was very minute drops but now it is sheding up to 1/2 a litre of water/day. this is especially common AFTER using DHW (not during). I have shown it 2 plumbers - the first guy reckons the whole valve needs replacing and the second chap say it just needs serving (replacement of diaphragm). I am a novice at these sorts of things and would appreciate any guidance on whom to believe or what to expect in terms of cost for repair/replacement. Also any idea how much a service may cost for this boiler. I thought getting a couple of quotes would be a good indicator but because they are claiming to different solutions I don't know what to do. PLEASE HELP>>
