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BWT Bewamat 75B Water Softener
€
6150
€
1350
BWT Bewamat 75B is a high-capacity simplex water softener designed for softening or partial softening of drinking and service water. It helps reduce limescale formation in pipes, fittings, boilers and connected equipment by removing calcium and magnesium through ion exchange.
The system uses intelligent quantity-dependent regeneration. Based on the programmed water hardness and available softened-water capacity, the controller checks whether the remaining reserve is sufficient for the following day and initiates regeneration when required. If the available capacity is not consumed within four days, the electronic control automatically triggers regeneration.
Bewamat 75B also includes an integrated system that disinfects the ion-exchange resin during regeneration, while spring-loaded non-return valves protect the inlet-side water connections. The 75B model additionally allows two capacity levels to be selected, making it suitable for larger applications with different performance requirements.
With a nominal capacity of 75 m³x°dH, approximately 21 litres of ion-exchange resin, a nominal flow of 1.8 m³/h and a maximum flow of up to 2.5 m³/h, Bewamat 75B is suitable for larger houses, villas and selected commercial applications where a higher treatment capacity is required than from compact residential cabinet softeners.
The system uses regeneration salt conforming to DIN EN 973 Type A. Approximate salt consumption is 3.5 kg per regeneration, with around 128 litres of regeneration water required per cycle. The salt storage capacity is up to 50 kg.
BWT also specifies that a protective particle filter must be installed upstream, no more than 1 metre before the softener, to prevent dirt and corrosion products from entering the system.
The system uses intelligent quantity-dependent regeneration. Based on the programmed water hardness and available softened-water capacity, the controller checks whether the remaining reserve is sufficient for the following day and initiates regeneration when required. If the available capacity is not consumed within four days, the electronic control automatically triggers regeneration.
Bewamat 75B also includes an integrated system that disinfects the ion-exchange resin during regeneration, while spring-loaded non-return valves protect the inlet-side water connections. The 75B model additionally allows two capacity levels to be selected, making it suitable for larger applications with different performance requirements.
With a nominal capacity of 75 m³x°dH, approximately 21 litres of ion-exchange resin, a nominal flow of 1.8 m³/h and a maximum flow of up to 2.5 m³/h, Bewamat 75B is suitable for larger houses, villas and selected commercial applications where a higher treatment capacity is required than from compact residential cabinet softeners.
The system uses regeneration salt conforming to DIN EN 973 Type A. Approximate salt consumption is 3.5 kg per regeneration, with around 128 litres of regeneration water required per cycle. The salt storage capacity is up to 50 kg.
BWT also specifies that a protective particle filter must be installed upstream, no more than 1 metre before the softener, to prevent dirt and corrosion products from entering the system.
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High-Capacity Water Softening
Built for Larger Homes and Higher Water Demand
BWT Bewamat 75B is a high-capacity simplex water softener designed for softening or partially softening drinking and service water. It is particularly suitable for larger homes, villas and selected commercial applications where a compact residential softener may not provide sufficient treatment capacity.
01 75 m³×°dH
Nominal Softening Capacity
High treatment capacity allows the system to handle significantly larger volumes of hard water between regeneration cycles.
02 1.8 m³/h
Nominal Flow
Suitable for larger residential installations and applications with higher continuous water demand.
03 21 L
Ion-Exchange Resin
A substantial resin volume provides the softening capacity needed for larger properties and demanding installations.
How It Works
Reliable Ion-Exchange Softening
Bewamat 75B removes calcium and magnesium ions responsible for water hardness and replaces them with sodium ions. This reduces the tendency of water to form limescale throughout the property.
1
Hard Water Enters
Incoming drinking or service water passes through the ion-exchange column containing softening resin.
→
2
Calcium & Magnesium Are Removed
Hardness-forming ions are retained by the resin and exchanged for sodium ions.
→
3
Softened Water Is Supplied
The treated water is supplied to the home with significantly reduced hardness and lower scale-forming potential.
01 Hard Water
02 BWT Bewamat 75B
03 Softened Water
Intelligent Regeneration
Regeneration Based on Actual Water Use
Bewamat 75B uses intelligent quantity-dependent regeneration. The controller calculates the remaining softened-water capacity and determines whether regeneration is required to provide enough treated water for the following day.
01
Consumption-Based Control
The system monitors the available supply of softened water and does not rely solely on a simple fixed regeneration interval.
02
Automatic Regeneration
At a programmed time, the controller checks whether the remaining softening capacity is sufficient for the next day and initiates regeneration when necessary.
03
Automatic Hygiene Cycle
If the available softening capacity is not used within four days, the electronic control automatically triggers regeneration.
04
Resin Disinfection During Regeneration
The unit includes a dedicated system that disinfects the ion-exchange resin as part of the regeneration process.
Two Capacity Levels on Bewamat 75B
The 75B model allows two capacity levels to be selected in the controller, making it possible to adapt the system for larger applications or lower performance requirements.
Whole-Home Protection
Reduce Limescale Throughout the Property
By reducing water hardness, Bewamat 75B helps protect plumbing, sanitary fittings, boilers and connected equipment against calcification and scale-related damage.
01
Plumbing & Pipework
Lower hardness reduces scale formation inside pipelines and helps maintain hydraulic performance over time.
02
Boilers & Water Heaters
Reducing calcium and magnesium helps limit mineral deposits on heating surfaces and connected equipment.
03
Bathrooms & Fixtures
Softer water means fewer white mineral deposits on taps, shower glass, mixers and ceramic surfaces.
04
Large Residential Applications
The high nominal capacity makes Bewamat 75B suitable for villas and other properties with greater water demand than smaller residential softeners are designed to handle.
Regeneration & Maintenance
Designed for Straightforward Ongoing Operation
Bewamat 75B uses standard regeneration salt tablets and provides clear service and salt notifications through the controller.
Salt Capacity Up to 50 kg
Maximum regeneration salt storage.
Salt per Regeneration Approx. 3.5 kg
Typical regeneration salt consumption.
Regeneration Water Approx. 128 L
Approximate water requirement per regeneration cycle.
Service Notification 150 regenerations
The controller displays a service reminder after the specified cycle count.
Technical Data
Technical Specifications
Key technical characteristics of the BWT Bewamat 75B 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 | 1.8 m³/h |
| Pressure loss at nominal flow | 1.0 bar |
| Nominal capacity according to EN 14743 | 75 m³ × °dH / 13.4 mol |
| Regeneration salt consumption | Approx. 3.5 kg |
| Regeneration water requirement | Approx. 128 L |
| Ion-exchange resin volume | 21 L |
| Maximum salt storage | 50 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 | 1090 × 390 × 460 / 560 mm |
| Connection height | 960 mm |
| Overflow height | 650 mm |
| Minimum drain connection | DN 50 |
| Approx. operating weight | 100 kg |
Nominal Flow 1.8 m³/h
Capacity 75 m³×°dH
Resin Volume 21 L
Operating Pressure 2.5–8 bar
Protective Pre-Filter Is Required
BWT specifies that a protective filter must be installed upstream of the water softener and no more than 1 metre before the unit. This helps prevent dirt and corrosion products from entering the control valve and ion-exchange column.
Mains Water → Protective Filter → BWT Bewamat 75B → Softened Water
* Final system sizing should be based on actual inlet hardness, required outlet hardness, peak water demand and available inlet pressure.
FAQ
Frequently Asked Questions
Key questions about BWT Bewamat 75B, capacity, regeneration and installation.
What is BWT Bewamat 75B?
+
BWT Bewamat 75B is a simplex ion-exchange water softener designed for softening or partial softening of drinking and service water in larger residential and selected commercial applications.
What does the 75B capacity mean?
+
The unit has a nominal softening capacity of 75 m³×°dH. Actual treated-water volume between regenerations depends on the hardness of the incoming water and the selected blended water hardness.
How does intelligent regeneration work?
+
The controller calculates the remaining supply of softened water and checks at the programmed regeneration time whether sufficient capacity remains for the following day. Regeneration is initiated when required.
Does the system automatically regenerate if water use is low?
+
Yes. If the available softening capacity is not used within four days, the electronic control automatically triggers a regeneration cycle.
Does Bewamat 75B disinfect the resin?
+
Yes. BWT specifies an integrated system that disinfects the ion-exchange resin during regeneration.
How much salt does Bewamat 75B use?
+
Approximate regeneration salt consumption is 3.5 kg per regeneration cycle. The salt storage compartment can hold up to approximately 50 kg.
How much water is used during regeneration?
+
BWT specifies an approximate regeneration water requirement of 128 litres for the Bewamat 75B.
Does Bewamat 75B 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, to prevent dirt and corrosion particles from entering it.
Can the outlet hardness be adjusted?
+
Yes. The system includes a blending valve that allows the final water hardness to be adjusted. BWT documentation recommends approximately 4–8 °dH for blended water.
Is Bewamat 75B suitable for a large villa?
+
It can be suitable for larger residential properties due to its 75 m³×°dH nominal capacity and 1.8 m³/h nominal flow. Final selection should be based on actual hardness, water consumption and peak simultaneous flow.
How is Bewamat 75B different from BWT Perla Seta?
+
Bewamat 75B is a high-capacity simplex softener with one ion-exchange column. Perla Seta uses a more advanced duplex architecture with two columns, higher peak-flow flexibility and additional connected water-management and safety functions.
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