Presta stem problem

5:29 am in Getting Started, questions by Flo


I’m building the MAMA farm,

but I have some problems with the reservoir bottles.

I can’t figure this step out:

Next, attach the metal inflation needle to the threaded tapered end of the presta stem. Using pliers, tighten as tight as possible.

I collected a lot of presta stems, but I have no idea on how to attach the air needle.

Can someone help me?