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This is a replacement boiler O-ring seal for the 9Barista Mk.2 espresso machine. It’s made from durable silicone rubber and designed to provide a tight, reliable seal between the boiler components.

Under normal use, 9Barista seals are built to last for many years. However, if the machine is overheated or the O-ring becomes damaged during cleaning or maintenance, it may need to be replaced to restore safe and efficient performance.

This official O-ring is manufactured to the exact specifications of the Mk.2 model. It ensures a pressure-tight fit, helping to maintain proper boiler function and prevent leaks.

This part is ideal for regular maintenance, emergency repairs, or keeping a spare on hand. Replacement requires basic tools and a familiarity with the machine's assembly.

One spare comes with every new 9Barista Mk.2 espresso maker as standard.

Material: Silicone rubber

Cross section: 3mm

Compatibility:

9Barista Mk.2 O Rings

Boiler O Ring Seal | 9Barista Mk.2