Part 03 · Changing your water
Should I use a water softener with my espresso machine?
Some makers call for one above a set hardness. Others are wary of the sodium kind. Here is where each stands.
The short answer
Some makers call for one, and others ask for caution. Nuova Simonelli says a softener must be installed above 3 grains per gallon for the Oscar II. Several ECM and Profitec manuals say water from sodium-based ion-exchange softeners isn't recommended. La Marzocco and Ascaso-USA advise caution.
Makers that call for a softener
Some makers set a hardness level above which they want a softener. Nuova Simonelli puts it at 3 grains per gallon for the Oscar II:
From the maker
Nuova SimonelliNuova Simonelli Oscar II
“If water hardness exceeds 3gpg a water softener must be installed.”
LUCCA, La Pavoni, Gaggia and Quick Mill also suggest a softener when water is hard, some with a number and some without:
| Maker | The maker's words | Source |
|---|---|---|
| GaggiaGaggia Classic GT | Note: to protect the machine from limescale, you must not use too hard water. If required, we recommend using a water softener. | Source for Gaggia, Gaggia Classic GT (opens in a new tab)Saved October 22, 2026 |
| IzzoIzzo Alex Duetto IV (Plus), plumbed-in mode | If your water is above 3 grains of hardness then a softening system should be installed to prolong the life of the machine. | Source for Izzo, Izzo Alex Duetto IV (Plus), plumbed-in mode (opens in a new tab)Saved October 28, 2026 |
| La PavoniLa Pavoni Cellini Evolution (water supply connection); the same PDF is linked for the Cellini Classic, which has no water supply connection | It is recommended that you install a water softener on the machine water supply system. | Source for La Pavoni, La Pavoni Cellini Evolution (water supply connection); the same PDF is linked for the Cellini Classic, which has no water supply connection (opens in a new tab)Saved October 28, 2026 |
| LUCCA (Clive Coffee)LUCCA Tempo | We recommend using a water softener if you get a measurement above 85 parts per million (PPM) or 5 grains per gallon (GPG). | Source for LUCCA (Clive Coffee), LUCCA Tempo (opens in a new tab)Saved October 28, 2026 |
| Quick MillQuick Mill Pop Up (model 2044) | The machine must be operated with soft, clean drinking water introduced in the tank. If the local water supply has a high mineral content use a water softener. | Source for Quick Mill, Quick Mill Pop Up (model 2044) (opens in a new tab)Saved October 28, 2026 |
Makers that advise against, or ask for caution
Other makers are wary of the most common kind of home softener, which swaps calcium and magnesium for sodium. Several ECM and Profitec manuals say so in the same words:
From the maker
ECMMechanika Max II (CM100028-00, -01)
“It is not recommended to use water from ion exchange water softeners (sodium-based) as this may affect the taste.”
| Maker | The maker's words | Source |
|---|---|---|
| AscasoAscaso home machines sold by Ascaso-USA: Dream PID, Steel DUO PID, Steel DUO PLUS PID, Baby T Plus (linked under WATER SPECIFICATIONS on each resource page) | Ascaso-USA recommends caution when using water softened with sodium and hydrogen based ion-exchange. | Source for Ascaso, Ascaso home machines sold by Ascaso-USA: Dream PID, Steel DUO PID, Steel DUO PLUS PID, Baby T Plus (linked under WATER SPECIFICATIONS on each resource page) (opens in a new tab)Saved October 28, 2026 |
| La MarzoccoLa Marzocco machines (La Marzocco North America water specification; it names no model) | La Marzocco recommends caution when using sodium and hydrogen based ion- exchange water softeners. | Source for La Marzocco, La Marzocco machines (La Marzocco North America water specification; it names no model) (opens in a new tab)Saved October 28, 2026 |
| MeticulousMeticulous Espresso | Avoid sodium-softened water. | Source for Meticulous, Meticulous Espresso (opens in a new tab)Saved October 22, 2026 |
| ProfitecGO 2.0 (CM500014-00..04) | It is not recommended to use water from ion exchange water softeners (sodium-based) as this may affect the taste. | Source for Profitec, GO 2.0 (CM500014-00..04) (opens in a new tab)Saved October 28, 2026 |
The two positions aren't always far apart. A maker can want softer water and still prefer a method other than sodium exchange to get there.
Softeners and chloride
Chloride matters to many makers because of corrosion. Decent Espresso separates two kinds of softener here:
From the maker
Decent Espressothe DE1 and Bengle
“Anion‑exchange softeners (used to reduce nitrate or tannins, or for dealkalization) can substantially increase chloride levels. Typical salt-based (or potassium chloride-based) water softeners do not significantly increase chloride levels in the water.”
A softener, or a filter cartridge
Some manuals treat a softener and an in-tank filter cartridge as two ways to reach the same hardness, and name a dealer for anything more:
From the maker
ECMCasa V
“When necessary, make use of a water softener / water filter cartridge in order to reach an adequate hardness level. If these measures are insufficient, a prophylactic descaling of the machine may be required. Contact your specialised dealer before undertaking this measure. Follow our descaling instructions (see page 23).”
If your machine's maker names its own cartridge, this list shows it. For a plumbed-in machine, see plumbing in.
Every softener quote we've saved
| Maker | The maker's words | Source |
|---|---|---|
| AscasoAscaso home machines sold by Ascaso-USA: Dream PID, Steel DUO PID, Steel DUO PLUS PID, Baby T Plus (linked under WATER SPECIFICATIONS on each resource page) | Ascaso-USA recommends caution when using water softened with sodium and hydrogen based ion-exchange. | Source for Ascaso, Ascaso home machines sold by Ascaso-USA: Dream PID, Steel DUO PID, Steel DUO PLUS PID, Baby T Plus (linked under WATER SPECIFICATIONS on each resource page) (opens in a new tab)Saved October 28, 2026 |
| Decent Espressothe DE1 and Bengle | Anion‑exchange softeners (used to reduce nitrate or tannins, or for dealkalization) can substantially increase chloride levels. Typical salt-based (or potassium chloride-based) water softeners do not significantly increase chloride levels in the water. | Source for Decent Espresso, the DE1 and Bengle (opens in a new tab)Saved October 28, 2026 |
| ECMCasa V | When necessary, make use of a water softener / water filter cartridge in order to reach an adequate hardness level. If these measures are insufficient, a prophylactic descaling of the machine may be required. Contact your specialised dealer before undertaking this measure. Follow our descaling instructions (see page 23). | Source for ECM, Casa V (opens in a new tab)Saved October 28, 2026 |
| ECMClassika III (CM100024-00) | It is not recommended to use water from ion exchange water softeners (sodium-based) as this may affect the taste. | Source for ECM, Classika III (CM100024-00) (opens in a new tab)Saved October 28, 2026 |
| ECMPuristika (CM100002-00) | When necessary, make use of a water softener to reach an adequate hardness degree. Filter the water if necessary before using it. | Source for ECM, Puristika (CM100002-00) (opens in a new tab)Saved October 28, 2026 |
| GaggiaGaggia Classic GT | Note: to protect the machine from limescale, you must not use too hard water. If required, we recommend using a water softener. | Source for Gaggia, Gaggia Classic GT (opens in a new tab)Saved October 22, 2026 |
Show all 17
| Maker | The maker's words | Source |
|---|---|---|
| La MarzoccoLa Marzocco machines (La Marzocco North America water specification; it names no model) | La Marzocco recommends caution when using sodium and hydrogen based ion- exchange water softeners. | Source for La Marzocco, La Marzocco machines (La Marzocco North America water specification; it names no model) (opens in a new tab)Saved October 28, 2026 |
| La PavoniLa Pavoni Botticelli Evolution, Botticelli Speciality (same PDF) | It is recommended that you install a water softener on the machine water supply system. | Source for La Pavoni, La Pavoni Botticelli Evolution, Botticelli Speciality (same PDF) (opens in a new tab)Saved October 28, 2026 |
| La SpazialeS1 Vivaldi (LUCCA A53) | If the installation of a water softener has been recommended by the installation engineer because of hard water and problems of scale deposits, it is necessary to follow the instructions of the water softener’s manufacturer (periodic regeneration). | Source for La Spaziale, S1 Vivaldi (LUCCA A53) (opens in a new tab)Saved October 28, 2026 |
| LUCCA (Clive Coffee)LUCCA Tempo | We recommend using a water softener if you get a measurement above 85 parts per million (PPM) or 5 grains per gallon (GPG). | Source for LUCCA (Clive Coffee), LUCCA Tempo (opens in a new tab)Saved October 28, 2026 |
| MeticulousMeticulous Espresso | Avoid sodium-softened water. | Source for Meticulous, Meticulous Espresso (opens in a new tab)Saved October 22, 2026 |
| Nuova SimonelliNuova Simonelli Musica | If water hardness exceeds 3gpg a water softener must be installed. | Source for Nuova Simonelli, Nuova Simonelli Musica (opens in a new tab)Saved October 28, 2026 |
| ProfitecGO 2.0 (CM500014-00..04) | It is not recommended to use water from ion exchange water softeners (sodium-based) as this may affect the taste. | Source for Profitec, GO 2.0 (CM500014-00..04) (opens in a new tab)Saved October 28, 2026 |
| ProfitecPRO 500 PID | When necessary, make use of a water softener / water filter cartridge in order to reach an adequate hardness degree. If these measures are insufficient, a prophylactic descaling of the machine is possible. | Source for Profitec, PRO 500 PID (opens in a new tab)Saved October 28, 2026 |
| Quick MillQuick Mill Pop Up (model 2044) | The machine must be operated with soft, clean drinking water introduced in the tank. If the local water supply has a high mineral content use a water softener. | Source for Quick Mill, Quick Mill Pop Up (model 2044) (opens in a new tab)Saved October 28, 2026 |
| RancilioSilvia (2010 manual edition) | pour about 2 litres of water into the tank (use drinking water, softened if possible). | Source for Rancilio, Silvia (2010 manual edition) (opens in a new tab)Saved October 28, 2026 |
| Slayer EspressoSLAYER espresso machines (support article; names no model; says 'All SLAYER Espresso Machines') | An ion exchange system should be used in combination with a carbon filtration system and is especially beneficial for water in the range of 6-9 grains of hardness. | Source for Slayer Espresso, SLAYER espresso machines (support article; names no model; says 'All SLAYER Espresso Machines') (opens in a new tab)Saved October 28, 2026 |
Sources
Every quote above is the maker's own wording, saved with its link and date. We link only to the makers' own manuals and pages.
- Nuova Simonelli, Oscar II Spec Sheet, Nuova Distribution USA, LLC. maker US distributor document (Nuova Distribution USA), file hosted by retailer KaTom (opens in a new tab), saved October 22, 2026.
- Gaggia, Gaggia Classic GT 120V manual 4219-466-00741 Rev.01. maker US distributor site (Gaggia North America) (opens in a new tab), saved October 22, 2026.
- Izzo, Alex Duetto IV Espresso Machine owner's manual by Chris' Coffee Service (PDF created 2017-11-30). US retailer manual (Chris' Coffee); importer status for Izzo not verified (opens in a new tab), saved October 28, 2026.
- La Pavoni, La Pavoni instruction manual for New Cellini Evolution / New Cellini Classic (usermanual/114 and /116, same PDF, created 2026-02-03). maker manual (opens in a new tab), saved October 28, 2026.
- LUCCA (Clive Coffee), LUCCA Tempo user manual (file LUCCA_TempoManual_Updated07.09.25_forPrint; PDF created 2025-07-09; Clive Coffee document on imagerelay). brand owner document (Clive Coffee, also the retailer) (opens in a new tab), saved October 28, 2026.
- Quick Mill, Quick Mill Pop Up instruction manual, model 2044 (maker manual, PDF created 2023-11-29). maker manual, linked by authorized US dealer Chris' Coffee (opens in a new tab), saved October 28, 2026.
- ECM, ECM Mechanika Max II user manual, item no. CM100028-00/-01, ECM Mechanika Max II_BA_V1.0 (BA-ECM_Mechanika-MAX-II-web-2604.pdf, ecm.de). ecm.de (opens in a new tab), saved October 28, 2026.
- Ascaso, Ascaso USA Water Specification (one-page PDF, Ascaso-USA; PDF created 2015-09-16, modified 2020-05-08). US distributor document (Ascaso-USA) (opens in a new tab), saved October 28, 2026.
- La Marzocco, La Marzocco Water Specification (1-page PDF, La Marzocco North America, Seattle; file created 2015-09-16; linked as 'La Marzocco Water Specification PDF' from La Marzocco Home USA's plumb-in article dated 07/09/2026). maker document (La Marzocco North America) (opens in a new tab), saved October 28, 2026.
- Meticulous, Water for Your Meticulous: Preventing Scale and Getting the Best Taste (Meticulous Home, Inc. Help Center; written by Roy Raanani, July 29, 2026). maker help center (opens in a new tab), saved October 22, 2026.
- Profitec, Profitec GO 2.0 user manual, item no. CM500014-00..04, GO 2.0_BA_V2.0 (ba_go.pdf, profitec-espresso.com). profitec-espresso.com (opens in a new tab), saved October 28, 2026.
- Decent Espresso, Water recommendations for the DE1 and Bengle (Decent docs; created 2025/11/24, updated 2026/10/20). decentespresso.com (opens in a new tab), saved October 28, 2026.
- ECM, ECM Casa V user manual, 11-2016; ECM PDF hosted by Whole Latte Love. maker document on retailer site (opens in a new tab), saved October 28, 2026.
- ECM, ECM Classika III user manual, item no. CM100024-00, Classika III_BA_V1.0 (BA_Classika-III-web.pdf, ecm.de). ecm.de (opens in a new tab), saved October 28, 2026.
- ECM, ECM Puristika user manual, item no. CM100002-00, 07-2024 (BA_Puristika_2407-web.pdf, ecm.de). ecm.de (opens in a new tab), saved October 28, 2026.
- La Pavoni, La Pavoni instruction manual for New Botticelli Evolution / Speciality (usermanual/135 and /134, same PDF, created 2024-06-20). maker manual (opens in a new tab), saved October 28, 2026.
- La Spaziale, La Spaziale MANUAL FOR USE AND MAINTENANCE S1 VIVALDI, LSC 010 Rev 00 Ed. 07/2014 (LUCCA A53 edition; PDF created 2015-02-25; hosted on a Shopify store file host and by Clive Coffee). maker document on retailer site (opens in a new tab), saved October 28, 2026.
- Nuova Simonelli, Nuova Distribution USA, LLC, "Musica Spec Sheet", Version 3.0 (PDF created 2010-03-17; simonelliusa.com). US distributor (Nuova Distribution USA, LLC) (opens in a new tab), saved October 28, 2026.
- Profitec, Profitec PRO 500 PID user manual, 09-2017; Profitec PDF hosted by Whole Latte Love. maker document on retailer site (opens in a new tab), saved October 28, 2026.
- Rancilio, Rancilio SILVIA use and maintenance manual, multilingual (PDF created 2010-08-26; Rancilio document hosted by Clive Coffee on imagerelay). maker document on retailer site (opens in a new tab), saved October 28, 2026.
- Slayer Espresso, SLAYER Water Treatment Requirements (Slayer support knowledge base article; created 2017-09-20, modified 2025-07-10). maker support site (opens in a new tab), saved October 28, 2026.
Questions
Is a water softener the same as a water filter?
No, though some manuals name them together. ECM's Casa V manual suggests "a water softener / water filter cartridge" to reach the right hardness.
Does a softener raise chloride?
Decent Espresso says typical salt-based softeners don't significantly increase chloride, but anion-exchange softeners can.
Mineral & Steam does not certify water as safe, guarantee protection from scale, corrosion or equipment damage, or recommend a machine as an overall purchase. It compares the water information you provide with documented manufacturer water requirements and shows the basis and limits of that comparison.
Keep reading
Caring for the machinePlumbing in an espresso machine: what makers ask of your water linePressure, flow, and a filter or softener before the machine. What La Marzocco, Nuova Simonelli, ECM, Profitec and Rocket ask for.What your machine needsChloride and espresso machines: the limits makers setMost makers that give a chloride number put it at 30 ppm or less. Every figure we've saved, in the makers' own words.