The HV4 Water Softener

The HV4 is the UK’s number one water softener and our
best selling model. It is ideal for homes with 1-2 bathrooms
and will easily fit under your kitchen sink.

Life with a HV4 water softener

The twin cylinder design and accurate metering system means it supplies uninterrupted softened water for your family. The HV4 water softener is easily maintained with the use of block salt. Simply place a fresh block in through the top of the water softener and you’re ready to go!

Compact and non-electric, the HV4 water softener is ideal for your family home. With over 40 years of experience, you can trust Harvey Water Softeners to get it right.

About The HV4

  • The UK’s number one water softener!
  • Requires block salt
  • Non-electric
  • Twin cylinder
  • 3,000 litres of softened water per day

96%* of customers recommend us

*Review Centre


  • Max peak flow rate – 56 l/m
  • 11 mins regeneration time
  • 300g of salt used
  • 17 litres of water used
  • Water pressure 1-10 bar (PRV recommended from 6 bar and above)


  • Height: 49.0cm
  • Width: 20.5cm
  • Depth: 44.0cm
man under sink
women on laptop

Payment Options

We have a variety of payment options available for our customers. We offer a three month trial, so that you can decide whether a water softener is right for you and your home.

Before you begin your three month trial, you can select one of our easy payment options. As soon as the trial is finished, if you decide to keep your Harvey Water Softener, the remaining balance (less payments already made) will be taken via your chosen payment method.

If you decide the water softener is not right for you, we will remove it and refund all payments you have made (excluding salt and tap purchases).

Below are our payment options:

  • Purchase outright
  • 0% interest payment plan with Harvey Water Softeners

For more information on purchase options, visit our payment options page.

The Harvey Guarantee

Your Harvey Water Softener™ is guaranteed for three years from the date of installation. You can get in touch with our team to extend your guarantee by ten years.

You can find more information about the Harvey Guarantee here..

Useful Guides

The HV4 Tech Sheet
The Harveys Information Pack

Our product range

The HV4

The UK’s number one water softener, the Harvey™ Water Softener HV4 model, is our best selling and most popular water softener. The twin cylinder design and accurate metering system means it supplies uninterrupted softened water to a standard sized home, straight from under the kitchen sink.

The non-electric, compact design gives your home the water it deserves. Simply maintained with the top up of block salt, with over 40 years of manufacturing water softeners – the Harvey™ Water Softener is the best choice for your home.


The Harvey™ Water Softener HVX model is our slightly larger block salt water softener. It’s particularly suitable for homes with 3-4 bathrooms or more, built to fit under the kitchen sink like our HV4 model.

It’s the most compact high capacity water softener ever designed, using the same twin cylinder design as the UK’s number one water softener. It has been built to satisfy the water demands of a larger modern home. The HVX doesn’t need any programming or regular maintenance, simply fill it up with block salt when it runs out.

Read more about The HVX.

The Big Blue

The Harvey™ Water Softener Big Blue model is a mains water softener and is the largest model we sell. It’s perfect for bigger homes and businesses, using the same unique twin cylinder design as our UK’s number one selling HV4. The twin cylinders ensure your home enjoys an uninterrupted supply of softened water.

The Big Blue fits to the mains water supply, even though larger than our standard twin cylinder models, it can still fit under the kitchen sink. This model needs tablet salt to function, it comes in 10kg and 25kg bags, which simply need to be replenished when it runs out. The salt is dropped into the top of the water softener.

Read more about The Big Blue.

Don’t just take our word for it! Join 200,000 of our happy customers.

Winchester, Hampshire
Winchester, Hampshire

Eastbury, Berkshir
Eastbury, Berkshir

Camberley, Surrey
Camberley, Surrey

Southampton, Hampshire
Southampton, Hampshire