1. small ventilation holes has been slow.2. the valve should be installed before the device.3. damage from ice easily.4. steam systems lose during normal operation through the hole of the Cup is turned upside down when the valve is open.5. On-Off mechanism for easy wear (from Gestra)6. is there any chance, if pressure increases rapidly.7. the water level of the device should be fixed at the time the Cup mouth below utrop.
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