Koenig bw1880 Instruction Manual page 21

Figure 31
Warning: Remember press the seal circle with empty cartridge
instead of new cartridge, or will cause hazard.
B. TO CHANGE BEER TUBE (show as figure 33)
Please replace the beer tube if beer tube is damaged and cause
beer leakage.
1． Pull down the locking of beer tube, and then draw out the tube.
2． Screw out the joint nut of beer tube, and draw the tube out.
3. Replace a new beer tube, and install the beer tube according
with reverse procedure.
NOTES: Don't move other screws when processing tube
replacement, otherwise, it may cause the beer leakage or gas
leakage.
1) Turn the faucet to the state of releasing, and then open the
cover to take out silicone tube.
2) Replace a new beer silicone tube, and install it according with
reverse procedure.
Slim metal stick
Cover
Silicone tube
Figure 33
CO2 connector
Seal circle
Empty CO2 cartridge
Figure 32