Called up the people i bought the PV from and although they were very helpful they couldn't actually do anything, and i can understand why, there are so many different reasons they can fail, i.e rubber seal not fitted properly, valve installed wrong way round, housing installed wrong way round just to name a few, that they cant just take my word for it that it wasn't a fault of mine that cause the failure :/ kind of sucks but not much i can do about it!