Breville Barista Express Water Filter Replacement | BES870

Water filter cartridge beside the Breville Barista Express water tank

Before you start

Unplug the machine before opening panels or touching internal components. Stop if you see damaged wiring, smell burning, or are unsure about a pressurized or electrical part.

Quick answer: The Barista Express BES870 manual calls for a fresh water filter about every two months, more often with hard water. Soak the replacement for five minutes, rinse it under cold running water, fit it in the holder, set the date dial two months ahead, and push the holder into the water tank adapter. A filter is routine maintenance; it does not repair a blocked water path.

When to replace it

Use the date dial as a reminder. A new cartridge is also sensible if the old one has been left in a stored machine beyond its service period. Confirm that your replacement matches the filter holder supplied with your BES870; filter systems can differ across machine revisions and regions. If a new filter does not fit securely, do not force the holder.

What you need

A compatible replacement water filter and the existing filter holder
Cold drinking water and a clean sink
A clean cloth for the tank

BES870 water filter replacement: soak and rinse, install in holder, set dial, seat in tank — Preparation and installation sequence; check the holder supplied with your machine.

Replace the filter

Switch the machine off. Remove and empty the water tank, then lift out the old filter holder.
Open the holder and discard the old cartridge. Wash the holder with cold water.
Soak the new cartridge in cold water for five minutes, then rinse it under cold running water.
Fit the cartridge into the two parts of the holder and close it. Set the date dial two months ahead.
Align the holder with the tank adapter and push it into place. Refill the tank with fresh cold water and seat the tank fully.

If water still does not flow

Check the tank is fully seated and that the cartridge and holder are installed correctly. If the machine had a flow problem before replacement, diagnose that separately using our BES870 no-water guide. Replacing a filter is not a substitute for the BES870 descaling procedure when that maintenance is due.

FAQ

Can I leave the old filter in indefinitely?

No. Follow the replacement interval in your machine’s manual; the BES870 manual specifies about two months and more often for hard water.

Does a new filter reset a cleaning alert?

No. The cleaning tablet cycle is a different maintenance task.

Source: Breville BES870 instruction manual, “Installing the Water Filter.”