Technical thread

[BeBraveBrother]

Hi, I am trying to connect my hose to the flowmeter but have no clue how to do it.
My idea is that the end of the hose (union nut) needs to be connected where the thing that I circled in red currently is.
However I can't screw it off by hand. I am thinking about using a plier or wrench to screw it Down but as I need to organize it (hardware stores closed because of lockdown) I would first ask of someone might have an idea if I am right etc..

Thanks a lot for any help in advance!

 

[Thanatonaut]

Can you not just order a nasal cannula? That barbed connector would fit that type of hose better, and it would be better to have a thinner hose than that.

 

[BeBraveBrother]

Can you not just order a nasal cannula? That barbed connector would fit that type of hose better, and it would be better to have a thinner hose than that.

Thanks a lot for your reply! :)

I found what you mean!
But the opening seems to be even tighter and it should close to flowmeter without a leak

.p.s.
Both the connector (red) and the the hose have 6millimiters.