Compact metered water softener
Digital control in a space-conscious cabinet
The Osmio 9L Digital Water Softener is designed for mains-fed homes where installation space matters. Its metered controller tracks water use and regenerates the resin according to demand rather than relying on a fixed daily schedule.
Efficient demand control
Regeneration matched to measured water use
The digital valve measures consumption and calculates when the resin needs to be regenerated. This helps avoid unnecessary cycles while maintaining the softener's available capacity.
- Meter-controlled regeneration
- Up-flow regeneration process
- Clear colour display and guided controls
- Compact all-in-one cabinet
Compact footprint
Approximately 300 mm wide and 495 mm deep.
Metered operation
Regenerates according to measured demand.
Useful reminders
Digital controls include a salt reminder function.
Rated flow
Manufacturer-listed rated flow of 0.8 m³/h.
Not sure how hard your water is?
Use our postcode checker to find your area's typical hardness and help confirm the correct softener capacity and settings.
Clear everyday control
A colour display for setup and monitoring
The control screen provides access to the operating settings and system information. The salt reminder helps make routine refilling easier to manage, while vacation mode supports periods when the property is unoccupied.
- Colour digital display
- Salt reminder function
- Vacation mode
- Manual regeneration control when required
Soft water throughout the home
Reduce limescale at the source
Ion-exchange resin removes the calcium and magnesium responsible for hard water. This helps protect boilers, pipework and water-using appliances while reducing scale deposits on taps, shower screens and bathroom surfaces.
Softened water also allows soaps and detergents to work more effectively, helping reduce residue on laundry, dishes, skin and hair.
Plan the installation
Compact cabinet with space for plumbing and service access
The listed cabinet dimensions are 497 mm high, 300 mm wide and 495 mm deep. Allow additional room for the inlet, outlet, bypass, drain and overflow connections, as well as access for salt filling and servicing.
- For municipal mains water
- 3/4-inch or 1-inch connection options listed
- Requires a nearby electrical supply and suitable drain
- Qualified installation is recommended
Before you order
Check the complete installation, not only the cabinet size
Water conditions
Confirm hardness, incoming pressure and peak household demand.
Connections
Plan the inlet, outlet, bypass, drain and overflow routes.
Power supply
The controller uses a 12 V AC, 650 mA output supply.
Service access
Leave room above and around the cabinet for salt and maintenance.
The product is sold as the Osmio 9L. Osmio's model-specific table lists the resin quantity as 10.5 litres, so both descriptions are shown here rather than treating them as interchangeable.
Technical information
Osmio 9L Digital Water Softener specification
| Product designation | Osmio 9L Digital Water Softener |
|---|---|
| Model | CS20-2013 |
| Height | 497 mm |
| Width | 300 mm |
| Depth | 495 mm |
| Mineral tank | 10 × 13 inches |
| Listed resin quantity | 10.5 litres |
| Salt storage capacity | 18 kg |
| Rated service flow | 0.8 m³/h |
| Backwash flow | 7.5 L/min |
| Water per regeneration | 60 litres at a listed salt dosage of 96 g/L |
| Inlet and outlet options | 3/4 inch or 1 inch |
| Operating pressure | 0.21-0.86 MPa (approximately 2.1-8.6 bar) |
| Operating temperature | 4-43°C |
| Feed-water source | Municipal water |
| Electrical input | 110-120 or 220-240 V AC, 50/60 Hz |
| Controller output | 12 V AC, 650 mA |
Official documentation
Osmio water softener manual
Review the general installation, programming, commissioning and maintenance guidance for the digital softener range. This is a range manual rather than a dedicated 9L technical sheet.
Helpful answers
Frequently asked questions
Why is it called the 9L if 10.5 litres of resin is listed?
“9L” is Osmio's product designation. The model-specific specification table lists 10.5 litres as the resin quantity, so the technical value is presented separately and transparently.
Does the Osmio 9L require electricity?
Yes. Its digital controller requires an electrical supply. The listed transformer output is 12 V AC at 650 mA.
How much installation space is required?
The listed cabinet dimensions are 497 mm high, 300 mm wide and 495 mm deep. Additional space is needed for connections, salt filling and future servicing.
Is the supplied manual specific to this 9L model?
No. It is a general manual for the wider Osmio digital water softener range. Use the model-specific specification on this page for the 9L cabinet and performance figures.
How do I know whether this is the right capacity?
Selection should be based on water hardness, daily demand, peak flow, pressure and available installation space. Contact us with those details and we can help check the model before you order.
Friendly expert support
Need us to check the Osmio 9L for your home?
Tell us your postcode, water hardness, plumbing system and number of bathrooms. We will help you check the capacity and installation requirements before you order.
