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Water Softeners

Infinity Ultra Water Softener

Large-Capacity Non-Electric Twin-Tank System · Suitable for 3+ Bathrooms · 10 Year Warranty

Key Features

Large-Capacity Twin-Tank

Continuous soft water for homes with 3+ bathrooms

Non-Electric

Powered by water pressure alone — zero electricity costs

10 Year Parts Warranty

Comprehensive manufacturer warranty with 2 years labour

High-Performance XP Valve

Advanced valve calibrated to your exact water hardness level

The Infinity Ultra is a large-capacity, non-electric twin-tank water softener designed for larger households with 3 or more bathrooms. Its pioneering twin-tank technology guarantees a continuous supply of softened water even under the most demanding conditions — with no downtime during regeneration.Featuring a high-performance XP valve calibrated to your exact water hardness level, the Ultra delivers exceptional flow rates and uses superior food-grade resin beads for greater capacity. Powered entirely by water pressure, it has zero electrical running costs.

Technical Specifications

Dimensions (W x D x H)480 x 395 x 657mm (+35mm for overflow elbow)
Salt TypeBlock Salt (Standard 4kg blocks) or Tablet Salt
Suitable For4+ bathrooms (larger households)
Flow Rate45-57 litres per minute
Water Pressure Range1.8 – 6 bar
Regeneration Time11 minutes
Water Per Regeneration22 litres
Power SupplyNon-electric (kinetic water power)
Connections (Inlet/Outlet)Custom
Warranty (Parts)10 years
Warranty (Labour)2 years (manufacturer service team)

Product Description

Large-Capacity Twin-Tank Technology

The Infinity Ultra features a pioneering non-electric twin-tank system that guarantees a continuous, uninterrupted supply of softened water — even in the busiest of households. While one tank softens your water, the second stands by ready to take over instantly when needed, so you never experience a moment without soft water.

Unlike single-tank softeners that rely on timers and must regenerate at set times (often in the middle of the night), the Ultra’s twin-tank design regenerates on demand based on actual water usage. This means greater efficiency, less salt wastage, and soft water available 24 hours a day, 7 days a week.

High-Performance XP Valve

At the heart of the Infinity Ultra is an advanced non-electric XP valve, precision-calibrated to your exact water hardness level. This delivers exceptional flow rates optimised specifically for UK plumbing systems, ensuring strong water pressure is maintained throughout your home even when multiple taps and appliances are in use simultaneously.

Infinity Ultra Water Softener

Superior Food-Grade Resin

The Ultra uses high-quality, food-grade resin beads that provide greater capacity and higher flow rates than standard resins. As hard water passes through the resin, calcium and magnesium minerals are removed through a process called ion exchange — turning your hard water into beautifully soft water that protects your home and family.

Built for Demanding Homes

Specifically designed for larger properties with 3 or more bathrooms, the Infinity Ultra has the capacity to handle the water demands of busy family homes, multi-generational households, and properties with high water usage. Its large-capacity tanks ensure consistent performance even during peak usage periods.

Economical and Eco-Friendly

The Ultra is entirely non-electric, powered solely by the kinetic energy of your water supply. This means zero electrical running costs and a smaller environmental footprint. The rapid 11-minute regeneration cycle uses just 22 litres of water, making it one of the most efficient large-capacity softeners available. It uses standard 4kg block salt, which is clean, easy to handle, and readily available.

Keith from Southern Softflow

Book A Free Home Survey Today

Our friendly team will visit your home, assess your water needs and provide a no-obligation quote

What To Expect

1

Speak To Us & Survey

Give us a call or complete our simple 60 second form. We will arrange a free home survey at your convenience.

2

Tailored Solution & Quote

We will visit your home, assess your needs and provide a no-obligation quote for the best solution.

3

Installation

Our experienced engineers will install your new water softener or drinking water system at a time that suits you.

4

Ongoing Support & Salt

We offer ongoing support, servicing and salt delivery to keep your system running smoothly.

Ben Southern working at his desk at the Southern Softflow office
Infinity water softener installed under a kitchen sink with filtration system and copper pipework
Infinity water softener and water filter system installed neatly inside a kitchen cupboard
Southern Softflow engineer delivering Harvey block salt to a customer doorstep

Our Services

We offer a full range of services from sales & installation of water softeners to ongoing maintenance and supplies

Water Softeners

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Drinking Water Systems

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Servicing & Repairs

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Salt Collection & Delivery

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What Our Customers Say

“We recently had Southern Softwater visit our home to walk us through the available options, and the experience from start to finish was excellent.The initial consultation was clear, informative, and pressure-free. They took the time to understand our needs, explained the different systems in a straightforward way, and answered all of our questions patiently. It felt like they genuinely wanted to help us make the right decision rather than just make a sale.The installation process was just as impressive. The installer arrived on time, was extremely professional, and worked efficiently while keeping everything tidy. He explained how the system works, made sure everything was set up perfectly, and left the area clean once the job was complete.Overall, we’re delighted with both the service and the product. It’s rare to find a company that delivers such a smooth and professional experience from consultation through to installation. Highly recommended.”

“Fast response to our enquiry, full information provided, work booked for following week. Fitter arrived on time, pleasant, efficient, very tidy and cleaned up when work finished. Very neat pipework, showed us how to isolate soft water if required at any time, and showed us position of new stopcock. Explained how filter system worked, helped us to set up App for notifications when salt low. Stacked spare salt in garage, advised how to apply for more supplies. Presented us with a delightful gift hamper of locally sourced products. Would highly recommend Southern Softflow Ltd.”

“Fantastic service from the Southern Softflow Team! My enquiry was dealt with promptly and expertly. We were first told by the guy from another local company who installed our water softener (before we owned the property) that the softener couldn’t be serviced reliably as it hadn’t been used for a while and was in any case 10 years old so in need of replacing. We were also told it would be unsafe to use and were quoted a heavy price by him to replace it. Keith from Southern Softflow came to have a look, He was knowledgeable, friendly and very understanding. He spent time analysing the water to make sure it was safe to use. He flushed the system through thoroughly and assured us the softener is in good working order so we wouldn’t need to replace it which was a great relief. Several weeks after Keith’s visit we are using our softener with no issues and are very relieved Southern Softflow operate in our area!”

“I have dealt with Southern Softflow for 22 years. Recently after 22 years a fault developed on the machine. The machine was taken away and repaired at a very reasonable cost. As I had moved house I had the machine installed by the kitchen company installing the kitchen and they made a poor job of the pipework needed. When Will from Southern Softflow brought the repaired machine back he rerouted the pipework and put new valves in and did a very neat and professional job. I am delighted. A very genuine and professional company ,a delight to deal with.”

“From the first contact through to survey visit and arranging for installation, this family-run company was excellent, with plenty of communication. The water softener had to be installed in a very restricted space with very difficult to access mains water inlet and drain. However the company plumber found a workaround, even preserving some of the middle shelf in the cupboard concerned. The installation was completed in one morning, working was clean, and the finished job is very neat.”

“Brilliant service. Survey done clear explanation of product from Ben. Fitting done three days later. Very helpful and tidy technician. Added a hard water tap at the last minute no problem. Would highly recommend the service and product. Thanks guys!”

Emily, a Southern Softflow customer, sharing her testimonial in her kitchen

Are You Fed Up With The Impacts Of Hard Water?

Emily was looking to protect her new build home in Shaftesbury, Dorset from the impacts of limescale. After living in her new house for two years ago and consequently became frustrated with the impacts of limescale.

See More Testimonials

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