This male quick connect with 1/4" hose barb will automatically shut off flow when disconnected. 

Here are some other ways you can use this male quick disconnect:

• Usable for both liquid and gas applications in high-pressure situations, up to 125 psi
• Integrated shutoff in these high-pressure disconnects means no more accidental beer leaks when disconnecting your CO2 feed from your carb stone
• Make draft line cleaning and replacement quick and mess-free with easily isolated lines to taps and kegs
• Create easily expandable and customizable CO2 distribution lines for your front-of-house draft setup
• Set up quickly usable utility CO2 lines for purging transfer hoses, brite tanks, kegs, and more
• Isolate CO2 feed lines for quick and easy repair/ replacement