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Are you considering buying a water softener system for your home or business?

You've probably been doing a lot of research on the internet. You may have spoken to friends or family who already have one or even had a couple of quotes.

Hydroworks are completely independent, which means we have no sales targets to hit.  This means the advice we can give you is always based on our knowledge and experience, and is therefore always best advice.  

Harvey's Water Softeners give their dealer range a 10-year guarantee , and are technically considered probably the best in the UK, whilst not necessarily being the most expensive.

Expertise that you can trust


"The industry is confusing!"

Everyone is telling you their water softener system is better than the rest. You may, therefore, appreciate some help in sifting through the information you have received.

An area where we often find confusion is what is and is not true about the different brands sold by Harvey Softeners, including the claims that some of their softeners are better than others. 

So we will attempt to give you all the information you need to answer any questions and enable you to make an accurate and fully informed decision.

This page covers the features and benefits of Harveys top brands, Minimax M3, Minimax Innova, Major, Big Blue, the TwinTec Cobalt, TwinTec S5, the Gemini, and the Harvey Arc.

Harveys Product Generations

In January 2020, Harveys launched the 5th generation of Block Salt Water Softeners, packed with very clever technology and tremendous performance testing.

To help clear up any confusion about the Harvey top brands you may have, We've written a page about the differences between Harvey's Water Softeners, TwinTec and Minimax. View our comparisons page.​

In the meantime, this quick and simple guide may help:

1st Generation

  • Crown Block Salt Softener​

2nd Generation

  • Minimax M1
  • TwinTec S2​
  • Dualflo

3rd Generation

These three softeners all feature the same flow rates, performances and efficiencies. These are no longer sold.

  • Minimax M2 
  • TwinTec S3
  • Harveys HV3​

4th Generation

Launched in January 2020.

These three softeners all feature the same flow rates, performances and efficiencies.  They all use the original rectangular 4kg blocks of salt.

5th Generation

The Elite range uses the new mini-curve salt and was released with significant success in December 2020.

Harvey Softeners launched three exclusive 'named' softeners to their premier dealer network, plus they also sell a version of it directly.

Each of these softeners is eco-friendly and operates on patented curved salt to guarantee purity, and all of these enjoy super high flow capabilities, the best performance and efficiencies.

From over 200 companies within the industry in the UK, just 28  local businesses (including Hydroworks) have been selected to market the premium quality Minimax and TwinTec products.

The Harvey Arc is available directly from Harvey Softeners via their sales reps.

  • Minimax Innova
    – available from Hydroworks
    and  selected Minimax Dealers (10-year parts guarantee)

  • TwinTec Cobalt and S5 (same machine, different cabinet)
    – available from selected TwinTec Dealers (10-year parts guarantee)

  • Harveys Arc
    – available from Harvey Softener sales reps directly (3-year parts guarantee)

  • Harvey Minimax Major
    - for large homes or businesses, powerful enough for 4 bathrooms.

  • Harvey Minimax Big Blue
    - The Big Blue is a high-flow, commercial water softener for up to 8 bathrooms.

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minimax logo

The Harveys Minimax softeners are an incredible feat of British engineering.

Each softener is hand-built, with batch pressure testing to an astonishing 1 million high-impact cycles (that equates to more than 114 years of use based on a family of 4!) – that's unheard of anywhere in the industry and which not just exceeds British Standards many multiple times over (their stipulation is 5,000 cycles), but guarantees you a softener that is better tested than any other softener in the market!

It has a less than 1% failure rate, too (0.4%, to be precise!), another incredible industry-leading achievement.

Harvey Minimax M3

4th Generation
The Innova, but with traditional block salt and no App.

Harvey Minimax M3
UK's only British Water Softener manufacturer

The emergence of the Minimax M3 saw the Harvey water softener become the world's most advanced and tested softener.

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Harvey Minimax Innova

5th Generation
The mini-curve salt softener has become the market leader.

Minimax Kitchen Closeup
UK's Best Water Softener

The Minimax Innova takes Harvey to the next level.
Exciting improvements make it the industry leader.

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Harvey Minimax Major

Best for larger homes or businesses.

Harvey Minimax Major
Phenomenal capacity and softening power

The Minimax Major is perfect for the larger home or small business and comes in a block or tablet salt model.

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Harvey Minimax Big Blue

Perfect for the commercial sector.

minimax big blue crop
Game-changing water softening technology

The powerful Minimax Big Blue commercial water softener is popular in larger homes with up to 6 bathrooms, hotels, launderettes and factories.

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Features and Benefits