Barrow Hardline compression fitting

krome_ninja_ · 19 Dec 2022 at 19:39

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

andy_mk3 · 19 Dec 2022 at 23:30

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

krome_ninja_ · 20 Dec 2022 at 05:08

andy_mk3 said:
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

Uncle Petey · 20 Dec 2022 at 10:36

They're just spares.
Put one under the cap if you really want to, but there's no need.

LuckyBenski · 20 Dec 2022 at 13:14

Lots of fittings have an o-ring and plastic washer you fit inside the screw cap. Without a plastic washer to compress the third o-ring I worry it'd get deformed anyway. I figure these are spares, as you get 2 in the pack and 2 in the fitting.

pastymuncher · 20 Dec 2022 at 13:45

I have Barrow hardline fittings although they have three O-rings inside the fitting and always slid the collar over the tubing followed by a fourth O-ring which will then be compressed by the collar when tightened and securely hold the tubing in place. If you don't have a O-ring inside the collar there is nothing to stop the tubing being pulled out. I also found a image on a competitors website showing the two O-ring fittings with a third fitted inside the collar so I would say that is the correct way of using them. Barrow always include spare O-rings with their fittings. Don't forget to chamfer the edge of the tubing so you don't damage the O-rings when inserting. Water on the end of the tubing helps it slide home too.