Isomac E61 Coffee Machine Silicone Group Seal water level regulator while the 0-2 position design

while the 0-2 position design provides reliable switching between off and on states

The stock Rancilio Silvia is typically set higher from the factory

festivals and outdoor events

4122 - O-Ring

Isomac E61 Coffee Machine Silicone Group Seal water level regulator while the 0-2 position designIsomac E61 Silicone Group Seal Genuine Replacement The group seal (group gasket) creates a watertight seal between the portafilter and the E61 group head. Over time, heat cycling causes the seal to harden, crack, or deform leading to leaks around the portafilter during extraction. If you're seeing water dripping from the group head when pulling a shot, or the portafilter feels loose and difficult to lock in, the group seal needs replacing. This is a