Which water softener should you choose for a flat?
In a flat, compact dimensions, easy maintenance and capacity suited to daily water use all matter. A compact water softener houses the resin vessel and salt tank in a single cabinet. It can serve the whole flat if installed before the pipework branches off. This category includes freestanding models and units designed for wall mounting.
A correctly sized ion exchange water softener offers three practical benefits:
- Less limescale on taps and in appliances supplied with softened water.
- Easier cleaning in the bathroom and kitchen thanks to reduced limescale deposits.
- The option to use less detergent by following the recommended dosage for soft water.
Small water softeners: what to check before buying
Cabinet size is only part of the choice. The unit also needs enough softening capacity between regenerations and a suitable flow rate when several outlets are used at once.
| What to check |
How to choose |
| Water hardness |
Measure it with a drop test kit. Harder water uses up the softening capacity of a given resin volume more quickly. |
| Water consumption |
Use water meter readings. The number of residents is a useful guide, but it does not replace actual consumption figures. |
| Service flow rate |
Compare the rated flow with your flat's demand, including situations where the shower and a tap run at the same time. |
| Dimensions and access |
Allow space for connections, a pre-filter, opening the lid, topping up salt and servicing. |
| Controls and accessories |
Check for metered regeneration, adjustable outlet hardness, a bypass valve and the accessories included in the set. |
Installing a water softener in an apartment
A softener is installed on the cold water supply to the flat, before the outlets it will serve. It requires a drain for regeneration wastewater, maintenance access and an electrical supply if the chosen model needs one. Allow for a sediment pre-filter as specified by the manufacturer. Check the required water pressure and connection sizes too.
Is your hot water supplied separately by the building? A softener on the cold water inlet will not change the hardness of a separate hot water supply. If water is heated inside the flat, the heater can be supplied with softened water through a suitable pipework arrangement. Coverage depends on how the pipes are connected, not simply where the unit stands.
How does a water softener work, and what does it cost to run?
An ion exchange water softener removes the calcium and magnesium ions responsible for hardness, replacing them with sodium ions. The resin is regenerated periodically with brine. In automatic models, the control valve manages this process. The user tops up water softener salt and carries out the maintenance specified in the manual.
When comparing costs, include the unit and installation, salt, regeneration water, electricity for powered models and periodic servicing. Regeneration frequency depends on water hardness, consumption, resin volume and control settings. The separate pre-filter needs cleaning or cartridge replacement according to its design.
Water softeners for flats: frequently asked questions
Can a water softener be installed under the sink?
Yes, if the unit's dimensions, maintenance access and pipe layout allow it. A connection to the kitchen tap's supply alone will soften water only at that outlet. To serve the whole flat, the softener must be installed before the relevant supply branches off.
Is a water softener with 10 litres of resin enough for a flat?
It can be, depending on water consumption and hardness. The number of residents alone is not enough to select a model. Compare the water volume available between regenerations and the service flow rate. With the same resin type and operating conditions, more resin provides greater capacity between regenerations.
Does an automatic salt-based water softener need a drain?
Yes. Resin regeneration and rinsing produce wastewater that must be discharged. Before buying, make sure a drain connection can be provided in accordance with the model's installation instructions.
Can a sediment or carbon filter replace a water softener?
A standard sediment filter traps suspended particles, while activated carbon can reduce chlorine and improve taste and odour. These cartridges alone do not remove water hardness. Ion exchange resin, as used in water softeners, is one way to reduce it.
Choose a water softener that suits your flat. Compare the models above or contact MojaWoda. Tell us your water hardness, monthly consumption, number of residents and available space. A photo of the pipe connections will help us assess installation options.
