. Harvey TwinTec S4 Water Softener. Now £1124.99. Code: Harvey

The Harvey TwinTec Series 4 Water Softener. 2 years Replacement & 10 Years Parts Warranty - regardless of your installer.

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Regular price £1,149.99 £1,450.00 | Save £300.01 (20% off)

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Buy the Harvey TwinTec S4 now for only £1124.99 - Use code: HARVEY to save an extra £25 off. Shop the Best Water Softener UK of 2024.

Get Free Delivery on all Harvey Water Softeners

Found the Harvey TwinTec Series 4 for a cheaper price online? We have a price match guarantee & pride ourselves on giving you the best price. We now also have buy now pay later options available.

We provide a 2 year labour and 10 year parts warranty.

As an exclusive & verified #1 Harvey online dealer our warranty is valid - regardless of your installer. Have a plumber install your system and save up to £600 off installation packages. Need help finding a plumber for your installation? Talk to us today on 02031486773 or view our referral list.

Is a Harvey Water Softener worth the money?

The Harvey Twintec S4 is a twin tank water softener from the UK's most trusted brand - Harvey Water Softener. Once installed this product will remove hard water and limescale from your entire home and is designed to last 10-20 years.

You Should Buy the TwinTec S4 if...

  • You have a property with 3 or 4 bathrooms or have a family of 3-8 people.
  • You have limed space underneath your kitchen sink.
  • You are looking for a softener that will last 10-20 years.
  • You need to remove hard water & limescale from your home.

Harvey Water Softener Comparison

The Harvey MiniMax Vs Harvey TwinTec S4 

When Comparing the Harvey TwinTec S4 to other water softeners such as the Harvey MiniMax and the Harvey Arc - you'll find the same technical specifications such as flow rate, pressure and efficiency. The Harvey MiniMax water softener is identical to the TwinTec S4 but is sold by different distributors. The Harvey Arc water softener is very similar to the TwinTec S4 and can only be purchased through Harvey direct. Of all models - get the best value for money with the Harvey TwinTec S4. Find out more in this Harvey Water Softener comparison

 exact same specification as the Harvey Ac water softener.

The Harvey Crown Water Softener Vs the TwinTec S4

When shopping for a water softener it's important to ensure you get the best value for money - and that means comparing specification, warranty and efficiency/running costs. When comparing the Harvey Crown and TwinTec water softener - you'll find big differences in efficiency, flow rate and the technology used. You an find out more in our Harvey Crown comparison. With the TwinTec model you'll get:

  • A 40% higher flow rate and performance - meaning no pressure loss.
  • 26% increase in water efficiency - 26% less water used during regeneration.
  • 15% increase in salt efficiency and 15% less salt used.
  • Lower running costs overall.
  • A 10 year warranty & guarantee vs only 1-5 years for the crown water softener.
  • A water softener that lasts longer, uses the latest technology & costs less to run.

Harvey Vs Kinetico Water Softeners

The Harvey Vs Kinetico debate is a popular one across water softener consumers - which brand is best? Both brands sell similar products but Harvey give you the best value for money with the best prices available. You can see a comparison here.

How Much is a Harvey Water Softener? Harvey Water Softener Price

How much are Harvey Water Softeners? Harvey Water Softener prices generally depends on a few things including the model you're purchasing, warranty and the retailer. The TwinTec S4 water softener comes with a 10 year warranty and has one of the best domestic water softener specifications available. With an RRP of £1450, right now our systems are on sale for £1124.99 - meaning you'll get the best quality product available at the best harvey water softener price. Don't pay more than you have to. We now also have a buy now pay later option available to help spread the Harvey water softener cost.

Harvey Water Softener Discount Code

Save money off with a Harvey water softener discount code. For the TwinTec S4, use the discount code HARVEY at checkout.

TwinTec Series 4 Specification

Click here to view the Harvey S4 Brochure PDF 

     General Specification

    Type of System: Twin tank, non-electric, block salt fed system.

    Dimensions: 490mm high and 205mm wide with a depth of 440mm.

    Efficiency: regeneration water volume of 17L with a time of 11 mins.

    Warranty: 10 years parts and 2 years labour.

    Max Flow Rate: 56L/min

    Max Pressure: 10bar

    Salt Usage: 300g per regeneration

    Key Features:

        • Small & Compact Size: the smallest twin tank softener that fits easily underneath your kitchen sink.
        • Twin Tank Design: designed to deliver soft water 24/7.
        • Non-Electric & Automatic: no timers or controls needed.
        • A 2 year replacement and 10 year parts warranty by NEWS: the S4 has a 10-year warranty for parts and a 2 year replacement warranty.
        • A Patented Metering System: allowing the softener to measure water usage very accurately – down to measuring two drips per second.
        • A Nano Technology Ultra Fine Resin: the patented resin of the S4 uses a unique ultra-fine exchange resin for higher flow rates and greater exchange capacity.
        • Smart Shuttle Metering for Pressure Adaptations: a smart shuttle meter for all different pressure systems including gravity-fed systems, tanks in the loft, combination boilers and high flow  cylinders.
        • High Flow Rate: with a max flow rate of 56 litres per minute, power showers and mega flows are no problem.
        • Great Efficiency: Uses only 300g of salt per regeneration which requires only 17L of water and takes just 11 minutes.
        • Tried & Tested Durability: these TwinTec designs are tried and tested for maximum durability & reliability.
        • Uses Block Salt- the reverse osmosis system is powered by a brine solution.

    Water Softener Installation

    A water softener is installed next to the stop tap, which is usually underneath the kitchen sink. This can be easily carried out by a plumber and you will usually require an installation kit. We offer installations in select areas in the UK, we also have a list of plumber referrals that can help! Need help finding a plumber for your installation? Talk to us today on 02031486773 or view our referral list.

    For Installation Manual Click Here



      Customer Reviews

      Based on 20 reviews
      Steve Willmott
      Twintec S4

      Perfect, very quick delivery. Really easy to install as we were replacing a failed Kinetico unit, which can’t have been working properly for a while as our water is now very nice. So much easier using salt blocks rather than tablets too.

      Should have fitted one years ago!

      We live in a very hard water area and fitting this water softener has made a huge difference, should have done it years ago! Showers feel nicer, no more unsightly limescale stains, no more descaling of kettles and appliances. Even car washing is less of a chore, everything is sparkling. The block salt is a godsend so convenient and seems to last well changing on average every 4-6 weeks.
      Harvery is a quality product, choosing the TwinTec was a no-brainer.
      Easy online ordering and fast delivery. Very pleased, thank you!

      Prompt Service

      This softener arrived as arranged. My bungalow is in the process of refurbishment. I live in an area of very hard water and know a softener is essential. It has been fitted but I am not living in the bungalow yet. I would be able to give a more useful review in a few months.

      Elizabeth Lloyd
      Well worth it

      Our previous softener had been in place many years and we suspected it was no longer performing well. The difference in our water since getting the Harvey TwinTec is amazing. No maintenance required going forward other than replacing the salt blocks

      James Weston Landscaping&Swimming Pools Ltd
      Harvey series4 water softener

      Excellent service, arrived on time and well packaged, plenty of fittings supplied with the unit with very good installation instructions.

      SIZE & FIT


      Returns Policy

      We offer a returns policy for stock items ordered only if the following applies: . The return reason is due to an error made by NEWS, whereby we will refund the item and the delivery charges. . The purchased item is faulty or damaged. In the event of a damaged or fault product, the customer must contact our customer service and returns team within 3 working days of delivery. In this event, a replacement or refund will be arranged. The return must be logged within 14 days after the original purchase. If a return is due to a customer error or change of mind - there may be a restock fee applied.


      For orders over £1000 shipping is free of charge. Shipping costs for orders under £1000 is £5.99. All orders are processed within 1 to 3 business days (excluding weekends and holidays) after receiving your order confirmation email. You will receive another notification when your order has shipped. We use an express delivery courier who collect the day after order and deliver within 1-3 working days following collection.

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