water solutions for your home espresso machine | La Marzocco Home New Zealand

water solutions for your home espresso machine

before your first cup, test the water

Water is such a crucial component to making espresso as it makes up 95-98% of you coffee. Using the appropriate filtered water with your machine is not only beneficial for making great tasting coffee, it also helps to protect the machine and ensure it remains in top condition.Water is tricky and can change depending on where you are located and the time of year. We recommend testing the water entering your machine using the water testing kit provided to check that it fits inside the below parameters. If you need additional water kits or any advice on  what water you should be using, please contact us.


For optimum machine performance, the water properties should fall within the following parameters:


value units min. max
T.D.S ppm 90 150
Total Hardness ppm 70 100
Total Iron ppm 0.0 0.02
Free Chloride ppm 0.0 0..05
Total Chloride ppm 0.0 0.1
pH 6.5 8
Alkalinity ppm 40 80
Chloride ppm 0 30


water testing tips

Always use cold water from either the tap, filtration cartridge or bottle – do not test hot water or water from the machine.

Once you have tested the water, you can enter the results in the La Marzocco Water Calculator.

If you choose to use bottled water for your machine, check that the required minerals are present. Water with a low mineral count, or distilled water, will not be recognised or accepted by the machine causing the blue water light to flash even when the reservoir is full.



water solutions


bwt filter jug

For most town water supplies in New Zealand the BWT Magnesium Mineraliser Jug should be sufficient to treat the water and make it suitable for use in the Linea Mini.  We always recommend testing your water source, before and after treatment, to confirm it’s suitable in your case.

We sell BWT’s magnesium mineraliser 2.7l jug for $67.21  (comes with one replaceable cartridge)
We sell cartridges in a pack of three for $63.61.

Plastic Wastage: The BWT cartridges are easily dismantled for recycling.


bwt inline filter (connected directly to the mains water supply)

We sell BWT water treatment cartridges and heads, which are a high quality European product designed specifically for use with espresso machines. :

– Water optimisation for all hot and cold drinks

Excellent protection against equipment corrosion

– Reliable prevention of stainless steel corrosion

– Protection against the most stubborn residues, e.g. gypsum

– Reduces maintenance costs to minimum levels

– Extends the life of the equipment


The Size S Bestprotect cartridge will treat 1,525 litres of water at 70ppm General Hardness.

Install Costs:  Variable.  The minimum required parts; cartridge head, pressure reducing valve, and connecting kit would be approximately $230  (labour, travel and the actual cartridge would be additional to this).

Plastic wastage:  Low (although the cartridges are not yet easily recyclable in NZ, you only use one a year)


bottled water

Be sure to read the details on the bottle of the mineral content etc, and choose one that fits within the parameters recommended in the Linea Mini Manual.  Some bottled waters will have far too much mineral content or be too acidic. Do not use distilled water though, its mineral content is so low that it may not be recognised by the Mini’s water level sensor.

Plastic Wastage: If the other options mentioned won’t work for you, we recommend boxed water in cardboard to avoid plastic wastage.