Magnesium Mineralized Water
Water mineralisation technology from BWT — a company that describes itself as Europe's leading water technology group. Protection for your equipment, care for the planet and a new standard for every drink you serve.
A conventional filter only takes something away. BWT's patented magnesium technology goes one step further: the ion exchanger is charged with magnesium, so as the calcium that forms limescale is bound and removed, magnesium is released into the water in exchange.
In a sensory panel study led by Prof. Chahan Yeretzian at ZHAW and sponsored by BWT, shifting the brewing water's mineral balance towards magnesium significantly reduced bitterness and astringency. Mineral content is a genuine variable in extraction, which is why speciality roasters specify their water.
BWT publishes a magnesium release of roughly 25–30 mg per litre for its mineralising cartridges, and positions the result as a contribution to your daily magnesium intake. Magnesium is an essential dietary mineral, and water is one of the ways people take it in.
Calcium and carbonate hardness are what turn into limescale inside boilers and heat exchangers. Exchanging calcium for magnesium means the scale formers leave without stripping the water down to a flat, empty mineral profile.
Mains water in
Carries calcium and carbonate hardness — the source of limescale.
Mineralised water out
Low in limescale formers, enriched with magnesium.
Whether you pull three hundred espressos a day, run a floor of office workers or simply want better water at home — there is a BWT system sized for it.
Professional filter cartridges for espresso machines, combi ovens, ice makers and vending. Consistent extraction, no limescale, no service surprises.
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Mains-fed water points delivering ambient, chilled and sparkling water, with a UVC lamp at the outlet. No bottle deliveries, no storage, no empty cooler on a Friday afternoon.
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The AQA drink Pure under-sink family with its own three-way tap — plus the magnesium-mineralising jug filters BWT is best known for.
See the modelsCoffee is over 90% water. Which cartridge you fit decides how your espresso tastes — and how often your technician visits.
The workhorse of the range. Five-stage filtration with a high-performance ion exchanger, covering the widest set of applications at the lowest cost per litre.
BWT's taste line. Removes limescale formers and mineralises the water with magnesium — the cartridge BWT markets for optimised coffee extraction and crema.
For difficult water chemistry — where sulphate or gypsum is present, or where corrosion and pH are the risk rather than hardness alone.
Limescale is the single most common cause of failure in professional coffee equipment. Carbonate hardness in the mains supply precipitates as scale the moment the water is heated, coating boilers, heating elements and heat exchangers. Scale is a poor conductor of heat, so as the layer builds, the same drink costs more energy and the boiler works harder to hold temperature — which is why brew temperature drifts and shot times start to wander long before anything actually breaks.
The commercial argument is simple. A replacement cartridge costs a fraction of a descaling service, and a small fraction of a boiler or heat-exchanger replacement. Manufacturers of espresso machines, combi ovens and ice makers also routinely make correctly specified water treatment a condition of warranty — meaning scale damage on an unfiltered machine is often not a warranty claim at all.
The right choice depends on your water and on the machine, not on the price list. Where hardness is the problem and cost per litre matters, bestmax is the all-rounder — and the line BWT also specifies for combi ovens, ice makers and dishwashers. Where the raw water carries sulphates as well as carbonates, ordinary decarbonisation leaves gypsum scale and a pH drop behind, and bestprotect is the answer; it is designed to work without a bypass and mounts vertically. And where you are selling the taste of the coffee, bestmax PREMIUM mineralises with magnesium — BWT lists it for coffee, espresso, vending and cold drinks rather than for steam equipment. Send us your water analysis, or just your address, and we will size it for you.
BWT frames its mission as changing the world sip by sip — replacing single-use bottles with water that is already in the building, delivered through a pipe that is already there.
Filtered mains water needs no bottling plant, no pallets, no delivery van and no recycling stream. For a business, the environmental case and the commercial case point in exactly the same direction: fewer deliveries, less storage, less waste to handle.
The scale of the problem, as BWT states it:
Figures above are BWT's published statements about the global plastic problem, not measurements of an individual installation. We are happy to calculate the bottles, deliveries and storage your own site would actually avoid.
In a working kitchen, elegance is measured in minutes. BWT's professional range is designed so a cartridge change is a short job, not a service call.
BWT states that the besthead FLEX filter head fits every BWT water+more filter cartridge, so you can move up or down a size as consumption changes without touching the plumbing. Note that 2XL wall installations need an additional retaining-bracket extension.
The blend valve sits on the filter head, with settings 0 to 3. It lets a controlled share of raw water rejoin the filtered stream, trading residual hardness against cartridge life. The right setting is prescribed by your hardness band and application — it is not a free choice. Some cartridges, such as bestprotect, are designed to work without a bypass at all.
The besthead FLEX carries two DVGW-compliant non-return valves, preventing backflow into the mains or into the cartridge, plus a venting valve and tool-free FLEX Insert connectors that remove the need for double nipples and transition fittings. Mounting orientation depends on the cartridge: bestmax can go horizontal or vertical, bestprotect is vertical only.
Request a free cartridge service-life calculation for your location and get a consultation with our engineer.
