A4 B7 avant TDI fuel union/ valve issue

[RB07tdi]

Im hoping someone can help me with my leaking fuel issue from the fuel filter valve/union on top of the filter.

Im.on my second filter and second plastic filter valve/ union. The fuel lines are in good shape so they seem but they are being held to the union via small jubilee clip instead of the standard clips. 

The minor fuel leak keeps occurring from thus plastic part and im unsure whether I've bought the wrong plastic valve for the 2.0tdi, I know you can get 1.9 all on ebay/ online but don't know if it differs from 2.0tdi

Has anyone had this or knows any more info?

Thanks

Richard 

[RB07tdi]

This is the union/ valve, and I cany quite work it out if its the fitment in the filter housing or the jubilee clips/ fuel lines