Group Seals

The group seal is a rubber ring that is positioned in a coffee machine's group head around the shower plate. The lip of the filter basket is designed to meet the group seal to become airtight. This ensures that all of the water is directed to the coffee grounds.

This may look like a tiny, insignificant part, but an old or missing group seal can have disastrous consequences. If this seal is not airtight, water will leak over the side of the portafilter and into the drip tray. The result of this is that less water is pushed through the coffee beans at the desired pressure and can seriously affect the quality of your coffee brew.

Group Seal Maintenance

Group seals maintenance is an essential aspect of espresso machine upkeep to ensure the optimal functioning of your espresso machine. Barista Warehouse recommends that you change group seals every 3-6 months to ensure the efficient running of your coffee machine and the best possible coffee brew.

New group seals are soft, full of natural elasticity. Old group seals lose this elasticity and can become caked with coffee oils and residues, and hence their ability to do their job properly.

Pro tip: some group seals on commercial machines such as Gaggia or Costa have one flat edge and one with a slight ridge. The flat edge should always be placed facing downwards, in contact with the portafilter or filter holder.

Relevant Categories To Group Seals

The Portafilter Collection

Portafilters are commonly considered one of the most important factors in brewing coffee. Portafilters house the coffee beans for brewing. Barista Warehouse boasts an impressive collection of portafilters, suitable for a wide range of commercial coffee machines.

The Shower Screens Collection

Shower Screens are essential to ensure the even dispersion of water across the coffee grounds. Barista Warehouse's Shower Screens Collection carries a wide range of high-quality shower screens to help you make the perfect cup of coffee.

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For all customers Australia wide, if you order your product today, expect it to arrive at your house within the next 1-4 days. For New Zealand customers, shipping times may take 3-4 days but will still arrive within the 4 day timeframe.

For a clearer look at when your products will arrive, there’s shipping tab with a chart that explains shipping expectations within the individual product listing.