Hkoenig bw1880 Manual De Instrucciones página 31

C. Replace the seal circle of beer tube (Show as figure 34)
Replace the new seal circle of beer tube if the connector has leakage
1. Turn out the beer tube as indication of bellowing figure
2. Take out the seal circle of beer tube
3. Replace a new seal circle on same position
4. Turn the seal circle tightly to avoid any leakage
Figure 34