Descrizione
The most expensive part of an espresso machine is the part nobody thinks about. Limescale forms inside the thermoblock and the brew group, narrows the water channels, and slowly changes the taste of every shot until the machine is descaled or replaced. The Clear Cup is the cheaper answer. Cartridges built for the Claris Blue fitment, dropped in every two months, and the water that reaches the coffee stays soft.
Inside each cartridge sit two working materials. Ion exchange resin pulls calcium and magnesium out of the water and holds them, and activated carbon removes chlorine, lead and copper while leaving the minerals that give coffee its body. The flow runs upward through the cartridge rather than sitting in it, which keeps water moving and makes the filter a poor home for bacteria. The result is water with hardness reduced by up to 80 percent, which is what protects the heating element and keeps the pressure steady at the group head.
One cartridge treats roughly 60 litres, which in normal household use means a change every two months. The compatible list covers the Jura GIGA 5, IMPRESSA Z9, Z7, J95, J90, J9.3, F8, F7, C9, C60, F50, A9, A1, ENA9 and ENA Mini machines, along with the ENA3, ENA4, ENA5, ENA9 and J9 models in the same family. Two option sizes are listed on the product selector, and the multi-pack keeps a year of cartridges on the shelf instead of ordering one at a time.
Scale takes years to build and one cartridge to prevent.
Key Features
- ✦ Ion exchange resin reduces water hardness by up to 80 percent.
- ✦ Activated carbon removes chlorine, lead and copper while retaining minerals.
- ✦ Up-flow design keeps water moving and resists bacteria growth.
- ✦ Each cartridge treats approximately 60 litres of water.
- ✦ Recommended replacement interval of about two months.
- ✦ Compatible with a wide range of Jura Claris Blue machine models.
- ✦ Multi-pack quantities available so replacements are always on hand.
Technical Specifications
- Type: Water filter cartridge, Claris Blue fitment
- Model Reference: 638
- Filtration Media: Ion exchange resin and activated carbon
- Housing Material: Plastic
- Colour: Light blue
- Hardness Reduction: Up to 80 percent
- Cartridge Capacity: Approximately 60 litres
- Replacement Interval: About every 2 months
- Flow Direction: Up-flow system
- Compatible Brands: Jura automatic espresso machines using the Claris Blue system
- Compatible Models: GIGA 5, IMPRESSA Z9, Z7, J95, J90, J9.3, F8, F7, C9, C60, F50, A9, A1, ENA9, ENA Mini, ENA3, ENA4, ENA5, J9
- Available Options: Two sizes listed on the product selector, 24.2 and 28.98
- Pack Contents: Filter cartridges in the quantity selected
- Origin: Mainland China
Where It Belongs
Households running a Jura automatic machine on municipal water, where hardness is the main long-term cost. Offices and small cafes with a machine in daily use benefit most from the multi-pack, since the two month interval arrives quickly under volume. Anyone who has already paid for a descale and wants to delay the next one has the clearest reason to keep cartridges on the shelf.
Frequently Asked Questions
Q: Which machines is this filter compatible with?
It fits Jura machines using the Claris Blue system, including the GIGA 5, IMPRESSA Z9, Z7, J95, J90, J9.3, F8, F7, C9, C60, F50, A9, A1, ENA9 and ENA Mini, plus the ENA3, ENA4, ENA5 and J9 models. Send us your model name and we will confirm before shipping.
Q: How often should the cartridge be replaced?
About every two months, or after roughly 60 litres of water, whichever comes first. Hard water regions reach the limit sooner, so watch for a slower flow or a change in taste.
Q: What does the filter actually remove?
Ion exchange resin captures calcium and magnesium, and activated carbon takes out chlorine, lead and copper. The minerals that contribute to coffee flavour are left in the water.
Q: Does it soften the water?
It reduces hardness by up to 80 percent, which is the range that protects a thermoblock from scale without stripping everything out of the water.
Q: How many cartridges come in an order?
The quantity follows the option you select. Multi-pack options are listed so a full year of replacements can be ordered in one go.
Q: Is this an original Jura part?
It is a compatible replacement cartridge for the Claris Blue fitment, made with ion exchange resin and activated carbon. It is not presented as a Jura branded original part.
Q: How do I tell when a cartridge has stopped working?
Three signs show up in order. The flow through the machine slows, the taste turns flat or slightly metallic, and the machine may prompt for a descale earlier than usual. Replacing on the two month interval avoids waiting for any of them.
The EastSupplier Promise
Cartridges are checked before dispatch and shipped with tracked delivery. Because fitment depends on the machine model, our team confirms compatibility from the model name or a photo of the existing cartridge before the order is packed, and multi-pack quantities ship together.
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