Sodastream cylinder adaptor

thingiverse

I acquired a pressure reducer for my CO2 project, planning to utilize the Sodastream CO2 cylinder with W21.8. However, I quickly realized these components are not compatible, prompting me to design an adaptor instead of purchasing one. This design allows the CO2 cylinder valve to open as I screw it together. I had sufficient space and decided to incorporate a "15mm hex extension brass fitting" into my design. An O-ring was added for optimal performance. The hex-shaped small part fits snugly inside the pressure reducer, requiring minimal filing after printing to achieve a secure fit. The upper cylinder housing holds an M3 nut that may need to be warmed up while installing to ensure proper positioning. Once in place, the M3 bolt is screwed firmly into position, cutting a thread in the plastic as it goes. This setup creates an adjustable valve opener piece. To adjust its performance, I tighten the screw before assembling the parts, ensuring it just touches and presses the Sodastream cylinder valve. If necessary, adjustments can be made to achieve optimal results. My printer was set to 0.4 hot-end and 0.2 layer height using ABS material for optimal print quality.