Technical diesel filter: is there an 'O'-ring or rubber spacer on the water sensor?

[SillyBilly]

Hi
I am just reassembling my diesel filter. I can't find an 'O'-ring or rubber spacer to go on the water sensor at the bottom though I did find a flat rubber seal on the drive. I can't believe that it is just the plastic casing of the sensor against the metal drum but no seal or washer is shown on eper and my local Fiat stealer said there isn't one on his diagram.
Can anyone confirm?
Thanks

 

[Agnelli]

HI! SILLYBilly The sealing gasket should be provided with a new filter.Use the one fitted to the old filter if it is not. You will NOT get a seal without this. CHANGED MY FILTER YESTERDAY. Undo the three retaining bracket nuts to enable you to raise the filter case to enable you to tighten the cable assembly at the base of the filter, Before bolting the filter holder to the bulkhead bracket.