Bottle Cap Co2 adapter

thingiverse

Small bottle-cap adapter allowing connection with two 6mm ID hoses by using M5 hose couplers. Earlier versions printed the coupler, which resulted in bad outcomes. Cut two M5 threads into the top inlet and outlet, as well as a M5 thread into the pipe adapter, where you must screw in an M5 brass or steel pipe. I've included multiple versions of the STL file for your reference. Take a look at the CapAdapter.scad file and adjust the parameters according to your preferences. To ensure a secure seal, use an O-Ring between the cap and the bottle, or modify the original seal of a bottlecap by cutting two holes into it. This project relies on the [Universal Hose Coupler & Funnel Maker](https://www.thingiverse.com/thing:44850) (CC-BY-SA), the [Necks & Caps for DIY projects](https://www.thingiverse.com/thing:1654620) (CC-BY), and the [OpenSCAD threads](http://dkprojects.net/openscad-threads/) libraries. This adapter has been specifically designed for use with my Arduino-controlled cocktail machine, as seen on GitHub at https://github.com/xythobuz/Arduino-Cocktail.