© 2025 FilterCY
Submit an application
Fill the form and we will contact you as soon as possible
By clicking the Submit button, you agree to our Data Privacy
Find the right water filtration system in 1 minute.
Answer a few quick questions and get personalized recommendations for the best water filtration system for your home — with a discount: a drinking water filter, water softener, or whole-house filtration system.
BWT Bewamat 25A Water Softener
€
6150
€
1350
BWT Bewamat 25A is a compact simplex water softener designed for softening or partially softening drinking and service water in residential applications. By reducing calcium and magnesium responsible for water hardness, it helps minimise limescale-related problems in pipework, fittings, boilers and connected household equipment.
The system operates using ion-exchange technology and includes an electronic controller with intelligent quantity-dependent regeneration. Based on the programmed water hardness and available softened-water capacity, the controller checks whether sufficient capacity remains for the following day and automatically initiates regeneration when required. If the available capacity is not consumed within four days, the electronic control triggers regeneration automatically.
During regeneration, the system also disinfects the ion-exchange resin, helping maintain appropriate hygienic operating conditions. Spring-loaded non-return valves are incorporated on the inlet side of the system.
Bewamat 25A has a nominal softening capacity of 25 m³x°dH, contains 8 litres of ion-exchange resin and provides a nominal flow of 1.4 m³/h according to EN 14 743. These characteristics make it particularly suitable for houses, apartments and smaller residential installations where the much higher capacity of Bewamat 75A is unnecessary.
The unit uses standard regeneration salt tablets conforming to DIN EN 973 Type A. Approximate salt consumption is 1.2 kg per regeneration, while regeneration water consumption is approximately 55 litres per cycle. The integrated salt compartment holds up to 15 kg of regenerant.
The outlet water hardness can be adjusted using the integrated blending valve. BWT recommends a blended-water hardness of approximately 4−8 °dH, allowing the installation to be configured according to local water conditions and the required final hardness.
BWT specifies installation of a protective particle filter upstream of the softener, positioned no more than one metre before the unit, to prevent dirt and corrosion products from entering the system.
The system operates using ion-exchange technology and includes an electronic controller with intelligent quantity-dependent regeneration. Based on the programmed water hardness and available softened-water capacity, the controller checks whether sufficient capacity remains for the following day and automatically initiates regeneration when required. If the available capacity is not consumed within four days, the electronic control triggers regeneration automatically.
During regeneration, the system also disinfects the ion-exchange resin, helping maintain appropriate hygienic operating conditions. Spring-loaded non-return valves are incorporated on the inlet side of the system.
Bewamat 25A has a nominal softening capacity of 25 m³x°dH, contains 8 litres of ion-exchange resin and provides a nominal flow of 1.4 m³/h according to EN 14 743. These characteristics make it particularly suitable for houses, apartments and smaller residential installations where the much higher capacity of Bewamat 75A is unnecessary.
The unit uses standard regeneration salt tablets conforming to DIN EN 973 Type A. Approximate salt consumption is 1.2 kg per regeneration, while regeneration water consumption is approximately 55 litres per cycle. The integrated salt compartment holds up to 15 kg of regenerant.
The outlet water hardness can be adjusted using the integrated blending valve. BWT recommends a blended-water hardness of approximately 4−8 °dH, allowing the installation to be configured according to local water conditions and the required final hardness.
BWT specifies installation of a protective particle filter upstream of the softener, positioned no more than one metre before the unit, to prevent dirt and corrosion products from entering the system.
Have a questions? Message us!
Residential Water Softening
Compact Water Softening for Everyday Home Use
BWT Bewamat 25A is a compact simplex water softener designed for softening or partially softening drinking and service water in residential applications.
It combines reliable ion-exchange technology with intelligent quantity-dependent regeneration to reduce limescale while keeping operation straightforward and predictable.
01 25 m³×°dH
Nominal Softening Capacity
Suitable for residential applications where a compact softener is sufficient for the home's typical water demand.
02 1.4 m³/h
Nominal Flow
Designed for normal household water use in apartments, houses and smaller residential properties.
03 8 L
Ion-Exchange Resin
Compact resin volume balances treatment capacity with a smaller physical footprint.
How It Works
Reliable Ion-Exchange Softening
Bewamat 25A reduces calcium and magnesium ions responsible for water hardness, helping minimise limescale formation in pipework, fittings, boilers and connected household equipment.
1
Hard Water Enters
Incoming drinking or service water passes through the ion-exchange resin inside the softening column.
→
2
Hardness Minerals Are Reduced
Calcium and magnesium ions are exchanged for sodium ions, lowering the hardness of the treated water.
→
3
Softened Water Is Supplied
The treated water is supplied to the property with significantly reduced scale-forming potential.
01 Hard Water
02 BWT Bewamat 25A
03 Softened Water
Intelligent Regeneration
Regeneration Based on Actual Water Consumption
The controller uses quantity-dependent regeneration. It checks the remaining supply of softened water and determines whether sufficient capacity is available for the following day.
01
Consumption-Based Control
Available softened-water capacity is calculated according to the programmed water hardness and actual consumption.
02
Automatic Regeneration
At the programmed regeneration time, the controller checks whether enough capacity remains for the following day and regenerates the column when necessary.
03
Automatic Cycle After Low Use
If the softening capacity is not used within four days, the electronic control automatically triggers regeneration.
04
Resin Disinfection
The system includes a device that disinfects the ion-exchange resin during the regeneration cycle.
Whole-Home Limescale Protection
Reduce the Effects of Hard Water Throughout the Home
By reducing water hardness, Bewamat 25A helps minimise calcification and scale-related problems in the household water system.
01
Bathrooms & Fixtures
Reduced hardness helps limit white mineral deposits on taps, mixers, shower glass and ceramic surfaces.
02
Boilers & Water Heaters
Lower calcium and magnesium levels help reduce scale formation on heating surfaces.
03
Household Appliances
Washing machines, dishwashers and other water-using appliances are exposed to less scale-forming hardness.
04
Plumbing & Pipework
Reduced hardness helps minimise mineral accumulation inside pipes and connected fittings.
Adjustable Blended-Water Hardness
The integrated blending valve allows the final water hardness to be adjusted. BWT recommends approximately 4–8 °dH for blended water.
Operation & Regeneration
Compact System with Low Regeneration Requirements
Compared with larger Bewamat models, the 25A uses a smaller resin volume and requires less salt and regeneration water per cycle.
Salt Storage 15 kg
Maximum regenerant storage capacity.
Salt per Regeneration Approx. 1.2 kg
Approximate regenerant consumption per cycle.
Regeneration Water Approx. 55 L
Approximate water requirement per regeneration.
Service Reminder 150 cycles
A service message is shown after 150 regenerations.
Technical Data
Technical Specifications
Key technical characteristics of the BWT Bewamat 25A residential simplex water softener.
| System type | Simplex water softener |
| Application | Drinking and service water softening |
| Technology | Ion exchange |
| Nominal connection | DN 32 / G 1¼" external thread |
| Nominal pressure | 10 bar |
| Operating pressure | 2.5–8.0 bar |
| Nominal flow according to EN 14743 | 1.4 m³/h |
| Pressure loss at nominal flow | 1.0 bar |
| Nominal capacity according to EN 14743 | 25 m³ × °dH / 4.5 mol |
| Regeneration salt consumption | Approx. 1.2 kg |
| Regeneration water requirement | Approx. 55 L |
| Ion-exchange resin volume | 8 L |
| Maximum salt storage | 15 kg |
| Power supply | 230 V / 50 Hz |
| Power consumption | 20 W |
| Protection class | IP53 |
| Water temperature | 5–30°C |
| Ambient temperature | 5–40°C |
| Approx. dimensions | 640 × 390 × 460 / 560 mm |
| Connection height | 500 mm |
| Overflow height | 280 mm |
| Minimum drain connection | DN 50 |
| Approx. operating weight | 40 kg |
Nominal Flow 1.4 m³/h
Capacity 25 m³×°dH
Resin Volume 8 L
Operating Pressure 2.5–8 bar
Protective Pre-Filter Is Required
BWT specifies installation of a protective filter upstream of the softener and no more than 1 metre before the unit. This prevents dirt and corrosion products from entering the system.
Mains Water → Protective Filter → BWT Bewamat 25A → Softened Water
* Correct system sizing depends on inlet hardness, desired outlet hardness, water consumption and available inlet pressure.
FAQ
Frequently Asked Questions
Key questions about BWT Bewamat 25A, residential water softening and regeneration.
What is BWT Bewamat 25A?
+
BWT Bewamat 25A is a compact simplex ion-exchange water softener designed for softening or partial softening of drinking and service water in residential applications.
What is the nominal capacity of Bewamat 25A?
+
The nominal softening capacity is 25 m³×°dH according to EN 14743. Actual water volume between regenerations depends on incoming water hardness and the selected blended-water hardness.
What is the nominal flow rate?
+
BWT specifies a nominal flow of 1.4 m³/h according to EN 14743, with a pressure loss of 1 bar at nominal flow.
How does intelligent regeneration work?
+
The controller monitors the available softened-water supply and checks whether sufficient capacity remains for the following day. If not, regeneration is initiated automatically at the programmed time.
Does Bewamat 25A automatically regenerate after low water use?
+
Yes. If the available capacity is not used within four days, the electronic system automatically triggers regeneration.
Does the system disinfect the ion-exchange resin?
+
Yes. BWT specifies that the ion-exchange resin is disinfected during regeneration.
How much salt does Bewamat 25A use?
+
Approximate salt consumption is 1.2 kg per regeneration. The system can store up to approximately 15 kg of regeneration salt.
How much water is used during regeneration?
+
BWT specifies an approximate regeneration-water requirement of 55 litres per regeneration cycle.
Can the final water hardness be adjusted?
+
Yes. The integrated blending valve allows the final water hardness to be adjusted. BWT recommends approximately 4–8 °dH for blended water.
Does Bewamat 25A require a pre-filter?
+
Yes. BWT requires a protective filter to be installed upstream of the water softener, no more than one metre before the unit.
What is the difference between Bewamat 25A and 75A?
+
Bewamat 25A is the more compact residential model with 25 m³×°dH nominal capacity, 8 litres of resin and 1.4 m³/h nominal flow. Bewamat 75A provides 75 m³×°dH capacity, 21 litres of resin and 1.8 m³/h nominal flow for larger applications.
Have a question?
