Water bottle rockets!

Step 4 Getting the valve in the cork.

First twist the valve into the cork.

Then press down on the cork really hard with the valve against a table. It should press fit in with a bit of effort.

The pictures are helpful here.

I think that if this doesn't work, putting hot glue along the shaft of the valve (along the long side) and then inserting it in would help. I haven't found anything but press-fit to be necessary.

And voila! You have a bottle rocket adapter!

Comments

[santigosopo]

 so ,  the  valve stay stuck with the inflator until bottle fly away