Barrow Hardline compression fitting

[krome_ninja_]

Hi! I am soon to chance out the fittings in my hardline build and have got some barrow tfykn fittings, these have two o-rings inside of the fitting pre installed, but it also comes with 2 loose o-rings in the bag, i'm just curious if anyone here has used these fittings and if so do you need to use the additional o-ring on the tube beneath the top cap? Thank you

 

[krome_ninja_]

That’s right yes put the oring on the pipe under the cap

Thanks for the reply I have attached an image to this reply, I'm just confirming that one of these two loose O-Rings go under the cap? I did message the store I purchased them from and they said you don't need to put one there, but without it the tube can be pulled out easier, there seems to be mixed responses on what to do, I couldn't find any instructions for the model tfykn-t14 fitting

The name for the fitting has: "TWIN SEAL HARD TUB" so adding an O-Ring under the cap would make it triple seal right?

Sorry for the questions, just trying to get it right before I start building with them, thank you