Track a week's consumption
Note the bottles opened, carafes filled and reusable bottles taken out. Include water used for drinks and differences between working days and family meals.
Separate still from sparkling water. Also note when several people help themselves at once. This gives you a reference volume and an idea of demand at the busiest times.
Decide what you like to serve
Taste, temperature and bubbles meet different needs. For cold water, check cooling capacity. For sparkling water, factor CO₂ supplies into your routine.
If your question concerns water composition, check your local supply results. For a particular substance, specify the parameter of interest and ask for the tests applicable to the equipment you are considering.
Match the treatment to your needs
Activated carbon, membranes and resin water softening serve different purposes. Each equipment page should explain its technology, conditions of use and maintenance tasks.
Compare the result you want with the documentation for the proposed configuration. The space needed, tap and connections are also part of the choice.
Compare the full cost
Use the same type of water, volume and period for both options. For bottles, start with the price you actually pay per litre. For the equipment, use the amounts in your quote.
At the start
The system, accessories, tap, connections and installation make up the initial cost. Identify any additional work separately.
Month by month
Add filters, servicing, water and electricity applicable to the configuration. For sparkling water, add CO₂ and refill terms.
Over your chosen period
The calculator adds up expenses using your figures. Fill in each item from your proposal to get a useful comparison.
Check how it fits your home
Open the cabinet where the system could go. Measure the free space, check access to water and work out how you will reach the consumables. Easy maintenance starts here.
Summarise your observations in a few lines: desired water types, estimated volume, space and budget to explore. You now have a basis for requesting a detailed configuration and quote.
Where does the comparison information come from?
Your purchases and bills give you your current budget. Your quote sets out the solution's costs. Product pages and manuals specify the equipment's functions and constraints.
For distributed water quality, Service Public provides access to health monitoring results by municipality. This guide offers a way to choose based on that information. Editorial update: 7 September 2026.