.please don't be a Lemming saying bosch,it is a marketing ploy,worcestors are cheap nasty plastic,just because they advertise on telly Lemmings like yourself buy them,Vailiant don't advertise on telly so why are they the UK's leading brand,cause you haven't guessed it yet have you!.Installers like them,they are well made,easy to fit,robust,easy to work on,they are made in Germany.Dont get to hung up on mega warrantie's as most manufactuers wiggle out of them
Plastic? how you dare calling WB plastic? Ray Stafford will be very angry, you have to say It's: EXPENSIVE GERMAN ENGINEERED COMPOSITE POLYMER MATERIAL, meaning: reinforced plastic.