Product Description

Calsoft Mini Water Softener with 22mm High Flow Kit

Part Numbers: WS-CALSOFT-MINI-HFK / CALSOFT-MINI (393800)

Protect your home from hard water and limescale with the Calsoft Mini Water Softener with 22mm High Flow Kit. This compact, automatic water softener supplies softened water throughout a suitable domestic plumbing system.

The Calsoft Mini has a 12.5-litre resin capacity and suits households of approximately 1–8 people. In addition, its metered control system monitors water use and starts regeneration only when required. Therefore, it avoids regenerating on a fixed schedule when the stored capacity has not been used.

This package includes the 22mm High Flow Kit. As a result, it suits many modern plumbing systems that need a higher flow rate, including compatible combi-boiler and unvented-cylinder installations.

Important: Always check the available installation space, water pressure, hardness level and expected household demand before ordering. The appliance, boiler or cylinder manufacturer should also confirm whether softened water can connect to its equipment.

Key Features

• Calsoft Mini automatic water softener
• Includes 22mm High Flow Kit
• 12.5-litre resin capacity
• Designed for households of approximately 1–8 people
• Metered regeneration system
• Regenerates according to water use
• Learns and remembers household water usage
• Maximum stated flow rate of up to 70 litres per minute with the 22mm kit
• Maximum recommended incoming pressure of 5 bar
• Helps reduce limescale throughout the home
• Helps protect compatible boilers and hot-water systems
• Helps extend the working life of water-using appliances
• Uses standard tablet salt
• Compact cabinet design
• Simple electronic controls
• Suitable for many UK domestic plumbing systems
• 5-year parts guarantee
• 12-month labour guarantee

Calsoft Mini Water Softener Specification

Download the Calsoft Mini Installation Guide

Read: Why Homes in Kent Benefit from a Water Softener

• Brand: Calsoft
• Manufacturer: Calmag
• Product type: automatic metered water softener
• Part number: WS-CALSOFT-MINI-HFK
• Softener model: CALSOFT-MINI
• Manufacturer reference: 393800
• Resin capacity: 12.5 litres
• Recommended household size: approximately 1–8 people
• Height: 660mm
• Width: 330mm
• Depth: 470mm
• Preferred salt type: tablet salt
• Salt storage capacity: approximately 15kg of tablet salt
• Regeneration control: automatic and metered
• Approximate salt use per regeneration: 2kg
• Approximate water use per regeneration: 85 litres
• Maximum softened-water capacity: up to 2,000 litres per regeneration
• Minimum operating flow: approximately 10 litres per minute
• Maximum stated flow with 22mm kit: up to 70 litres per minute
• Maximum recommended incoming pressure: 5 bar
• High Flow Kit connection size: 22mm
• Softener inlet and outlet connections: 3/4-inch or 1-inch BSP
• Parts guarantee: 5 years, subject to conditions
• Labour guarantee: 12 months, subject to conditions

What Is Included?

• 1 x Calsoft Mini 12.5-litre water softener
• 1 x compatible 22mm High Flow Kit
• Electronic metered control system
• Installation and operating information

Please note: Check the complete package contents when ordering. Salt, additional pipework, electrical work and installation materials may need to be purchased separately.

Why Use a Water Softener?

Hard water contains dissolved calcium and magnesium. When heated, these minerals can form limescale inside pipes, boilers and water-using appliances.

Limescale may also collect around taps, shower heads, sinks, baths and other visible surfaces. As a result, homeowners often need to clean these areas more frequently.

The Calsoft Mini uses ion-exchange technology to remove hardness minerals from the incoming water. Therefore, it supplies softened water to the connected parts of the home.

Benefits of Softened Water

• Reduces limescale around taps and shower heads
• Helps protect compatible boilers and hot-water equipment
• Helps protect washing machines and dishwashers
• Reduces scale inside kettles and other suitable appliances
• Can make baths, basins and shower screens easier to clean
• Can reduce soap scum in washing areas
• Allows soaps and detergents to lather more easily
• Can leave laundry feeling softer
• Can leave skin and hair feeling smoother after washing
• Helps preserve water flow through suitable pipework and fittings

The exact results will depend on the incoming hardness level, system design and household water use.

Includes a 22mm High Flow Kit

This package includes a compatible 22mm High Flow Kit. Therefore, it provides larger connections than a standard 15mm installation kit.

The 22mm kit helps reduce unnecessary flow restriction in suitable high-demand domestic systems. It can provide a maximum stated flow rate of up to 70 litres per minute under suitable operating conditions.

However, the actual flow rate will depend on several factors. These include the incoming pressure, pipe size, system layout, number of open outlets and pressure loss through the installation.

Suitable for Combi Boilers

The Calsoft Mini can work with many combi-boiler installations when fitted correctly. The 22mm High Flow Kit can help maintain the flow required by modern domestic systems.

However, always check the boiler manufacturer’s instructions before connecting softened water. Some manufacturers may set specific requirements for filling the sealed heating circuit or supplying the domestic hot-water side.

Suitable for Unvented Cylinders

The Calsoft Mini may also suit compatible unvented hot-water cylinder installations. Its 22mm High Flow Kit helps support systems that need a strong flow rate.

However, an unvented system needs the correct controls, safety devices and balanced water supply. Therefore, a qualified installer must design the pipework and confirm compatibility with the cylinder manufacturer’s instructions.

Automatic Metered Operation

The Calsoft Mini monitors how much water the household uses. It then calculates when the resin needs regeneration.

As a result, the softener regenerates according to demand instead of using a simple fixed-time programme. This can help reduce unnecessary salt and water use.

The control system also learns and remembers water-use patterns. Therefore, it can adapt its operation as household demand changes.

What Is Regeneration?

During normal use, the softener resin removes hardness minerals from the incoming water. Eventually, the resin reaches its working capacity and needs cleaning.

During regeneration, the unit uses a salt solution to refresh the resin. It then rinses the system and prepares it for the next supply of softened water.

The Calsoft Mini carries out this process automatically. However, the owner must keep the salt level topped up and follow the servicing instructions.

Water Softener Salt

The Calsoft Mini works with suitable tablet salt. Tablet salt is easy to handle and dissolves during the regeneration process.

Check the salt level regularly. In addition, avoid allowing the cabinet to remain empty for long periods because the unit needs salt to regenerate correctly.

Only use clean water-softener salt that meets the manufacturer’s requirements. Do not use cooking salt, grit salt or other unsuitable products.

Will the Calsoft Mini Fit?

The Calsoft Mini has the following cabinet dimensions:

• Height: 660mm
• Width: 330mm
• Depth: 470mm

Measure the installation area carefully before ordering. In addition to the cabinet size, allow space for the 22mm High Flow Kit, hoses, bypass arrangement, drain connection and electrical supply.

You must also leave enough room to open the lid and refill the salt. Therefore, do not install the softener tightly beneath a fixed shelf or worktop without checking the required access.

Choosing the Correct Water Softener Size

The manufacturer recommends the Calsoft Mini for households of approximately 1–8 people. However, household size is only one part of the calculation.

The correct model also depends on:

• Local water hardness
• Daily water use
• Number of bathrooms
• Number of showers and baths
• Expected simultaneous water demand
• Incoming water pressure
• Available installation space

A larger household in a very hard-water area may use the softener capacity more quickly. Therefore, check the full application before selecting the Mini model.

Maximum Recommended Pressure

The maximum recommended incoming pressure is 5 bar. If the water pressure exceeds this level, the installer may need to fit a suitable pressure-reducing valve.

Very low pressure may also reduce the available flow at taps and showers. Therefore, check the incoming static and dynamic pressure before installation.

Installation Requirements

The water softener needs a suitable position close to the incoming cold-water supply. It will also need:

• A suitable bypass arrangement
• A drain connection for regeneration water
• A protected overflow route
• A suitable nearby electrical supply
• Enough space for maintenance and salt filling
• Correctly sized pipework
• Suitable incoming water pressure

Keep the softener upright and protect it from freezing conditions. In addition, do not install it where leaking water could damage the building without suitable protection.

Drinking-Water Supply

UK installations normally retain a suitable unsoftened drinking-water supply, often at the kitchen sink. The installer must follow current Water Supply Regulations and local requirements.

People who need to follow a low-sodium diet should seek suitable professional advice before drinking artificially softened water.

Installation Guidance

• Check the incoming water hardness before setup
• Confirm that the household demand suits the Mini model
• Measure the installation space carefully
• Check the static and working water pressure
• Install the 22mm High Flow Kit in the correct direction
• Provide a suitable bypass arrangement
• Connect the regeneration drain correctly
• Provide a safe and visible overflow route
• Retain an appropriate unsoftened drinking-water supply
• Programme the control using the local hardness level
• Add suitable tablet salt before operation
• Follow the Calsoft installation instructions

Use a suitably competent plumber to install and commission the water softener. Incorrect installation may reduce performance, cause leaks or affect the guarantee.

Maintenance

Check the salt level regularly and refill the cabinet when required. Also keep the salt clean and free from dirt or other materials.

Inspect the bypass valves, hoses, drain and overflow connections for leaks. In addition, arrange servicing at the intervals recommended by Calmag.

Regular checks help the water softener continue to operate correctly. They can also identify small problems before they affect the water supply.

Guarantee

• 5-year parts guarantee, subject to the manufacturer’s conditions
• 12-month labour guarantee, subject to the manufacturer’s conditions

You may need to register the product to activate the full guarantee. Correct installation, commissioning, servicing and salt use may also affect cover.

Keep your proof of purchase and follow the Calmag installation and maintenance instructions.

Why Choose the Calsoft Mini?

The Calsoft Mini combines a compact cabinet with automatic metered operation. Therefore, it provides a practical whole-house solution for many domestic properties in hard-water areas.

Its 12.5-litre capacity suits households of approximately 1–8 people. Meanwhile, the included 22mm High Flow Kit helps it meet the demands of many modern plumbing systems.

Most importantly, the softener targets the hardness minerals that cause limescale. As a result, it helps protect compatible plumbing, hot-water equipment and household appliances.

Why Buy from SNH Tradecentre?

• Specialist plumbing and heating merchant
• Experienced advice before you order
• Complete Calsoft Mini package with 22mm High Flow Kit
• Water-softener installation products also available
• Nationwide UK delivery options
• Secure online ordering
• Support before and after your purchase

SNH Tradecentre supplies water-treatment products for homes in Kent and across the UK. Our team can help you check the softener size, installation kit and available space before you place your order.

Need help deciding whether the Calsoft Mini suits your home? Call the SNH Tradecentre team on 01843 842727.

Frequently Asked Questions

How many people can the Calsoft Mini supply?

Calmag recommends the 12.5-litre Calsoft Mini for households of approximately 1–8 people. However, local water hardness and daily demand will also affect suitability.

Does this package include the 22mm High Flow Kit?

Yes. This product package includes a compatible 22mm High Flow Kit.

What is the maximum flow rate?

The maximum stated flow rate is up to 70 litres per minute with the 22mm kit. Actual performance will depend on pressure, pipework and system demand.

Can it work with a combi boiler?

It can work with many compatible combi-boiler systems. However, check the boiler manufacturer’s instructions before connecting softened water.

Can it work with an unvented cylinder?

Yes, it may suit compatible unvented-cylinder systems when correctly sized and installed. A qualified installer must confirm the complete system design.

Does it regenerate automatically?

Yes. Its metered controller monitors water use and starts regeneration when required.

What salt should I use?

Use suitable water-softener tablet salt. Do not use table salt, cooking salt or grit salt.

How much salt does it hold?

The cabinet can hold approximately 15kg of tablet salt.

What are the dimensions?

The unit measures approximately 660mm high, 330mm wide and 470mm deep. Allow extra room for connections, maintenance and salt filling.

What is the maximum recommended pressure?

The maximum recommended incoming pressure is 5 bar. A pressure-reducing valve may be required where the supply exceeds this level.

Will softened water remove existing limescale?

A water softener prevents new hardness minerals from entering the connected system. Existing scale may reduce gradually, but results will vary with the installation and level of build-up.

Do I need an unsoftened drinking-water tap?

UK installations normally retain a suitable unsoftened drinking-water supply. Your installer must follow current Water Supply Regulations and local requirements.

Does the unit need electricity?

Yes. The electronic controller requires a suitable electrical supply installed in line with the manufacturer’s instructions.

Who should install the water softener?

Use a suitably competent plumber who understands water softeners, bypass valves, drainage requirements and current Water Supply Regulations.