Bleeder valve + manometer for soda-keg Handy for checking, and if necessary, reducing the CO2 content of your beer in the keg. For connection to the keg's CO2 connector. With a tap to allow excess CO2 to escape and a manometer for checking the pressure. Manometer in PSI (10 psi = 0.69 bar). Range: 0-60 psi (0-4 bar).