How to Use a Water Purifier Jug for Better Coffee
By Kiss the Hippo Coffee | London's Premier Specialty Coffee Roastery | Published: 2026-10-21
Category: How-to Guides
Learn how a water purifier jug can transform your coffee brewing water, remove off-flavors, and improve extraction for a cleaner, more balanced cup.
Quick answer
Using a water purifier jug like the Aarke Water Purifier Jug removes chlorine and adjusts mineral content, giving you cleaner, more consistent water for brewing coffee that tastes brighter and less bitter.
Why water quality matters for coffee
Coffee is over 98% water, so the minerals and impurities in your tap water directly affect extraction. Chlorine can mute delicate flavours, while excessive hardness or softness leads to under- or over-extraction. A water purifier jug gives you control without needing a plumbed-in system.
What to look for in a coffee brewing water filter
Not all jug filters are equal for coffee. Look for one that reduces chlorine and heavy metals but retains some beneficial minerals like magnesium and calcium. The Aarke Water Purifier Jug uses BWT-developed granules in refillable cartridges, letting you customise the taste and mineral balance rather than stripping everything out.
How to use a water purifier jug for better coffee
- Prepare the filter cartridge: Soak the new cartridge in cold water for 10 minutes to activate the granules, then rinse it under running water. Insert it into the jug and fill with cold tap water. Discard the first two jugs of filtered water to flush out any loose carbon dust. Skipping the initial flush can leave a carbon taste in your first brew.
- Fill the jug and let it filter: Pour cold tap water into the top reservoir and let it pass through the cartridge naturally. Do not force the water through by pressing or tilting. Wait until filtration stops before pouring. Forcing water through can bypass the filter media, reducing effectiveness.
- Use filtered water immediately for brewing: Pour the filtered water into your kettle and heat it to your usual brewing temperature (195-205°F or 90-96°C). Use it within a few hours — filtered water left sitting can absorb odours from the fridge. Stale filtered water can reintroduce off-flavours; always use fresh for each brew.
- Replace the cartridge on schedule: Change the cartridge every 4-6 weeks or after filtering about 60 litres, whichever comes first. Mark the date on the cartridge with a marker so you don't lose track. An expired cartridge can release trapped contaminants back into the water, making coffee taste worse than tap water.
Product facts
- Aarke Water Purifier Jug: The Aarke Water Purifier Jug features a ReFilter System with refillable cartridges and BWT-developed granules that allow you to customise your water's taste and mineral balance. This means you can tailor the water profile to your coffee beans, enhancing sweetness or acidity instead of using a one-size-fits-all filter.
Aarke Water Purifier Jug
