Borg & Overström B5 Install & Operation Manual page 14

Switch off the Carbonation System switch on the
back of the unit.
The tank is empty of sparking water when only
CO2 is being released.
Press and hold the Sparkling water dispense button
until all water is expelled.
Ensure to release the Sparkling water button and
take care to avoid releasing excess amounts of
CO2 gas.