Water-King WK1
The Water-King WK1 is suitable for most whole home applications

Water-King WK1-E 
The Water-King WK1-E is a significantly more powerful model designed to provide added protection to any large home. It is particularly effective at protecting homes with high output electric water heaters with an output between 5kW-12kW.

​Water-King is an electronic water conditioner that inhibits scale formation in hot and cold water services, removes existing scale deposits and is the only product of its kind proven by independent laboratory tests to partially soften hot water. It requires no plumbing and has a 25 year maintenance free design life. It really is a ‘fit and forget’ alternative to conventional salt softeners!

​If you’re an installer or specifier looking for our commercial range sold exclusively through approved plumbing merchants, please contact us.



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Product Description

Water-King is a market leading electronic water conditioner that:

  • Inhibits limescale formation and removes existing scale
  • Saves Energy, cuts bills and reduces your carbon footprint
  • Softens hot water; improves soap and shampoo lathering
  • Better for skin and hair (can help eczema & psoriasis)
  • Easy to install – no plumbing required
  • Proven performance in independent laboratory tests
  • No maintenance, salt or chemicals required for 25 year design life
  • Water remains potable and retains healthy minerals
  • Complies with Part L regulations
  • NO-QUIBBLE, 100 day money-back Guarantee

Unlike other types of water conditioner, independent tests have proven Water-King produces softer water with less dissolved calcium occurring in hot water. The table opposite shows how much Water-King can soften hard water.  After the first few weeks, during which the existing scale is removed, the hot water is half as hard as it was without the Water-King treatment.

Independent tests carried out by TFW Associates (Forensic Engineering Consultants to the Legal Profession) for the Advertising Standards Authority.

Where to install your Water-King

Unvented hot water systems

When a combi boiler is used, and there is no hot water cylinder, a single Water-King unit fitted on the rising main will provide the whole house with protection. If only the boiler needs protection from scale, locate the Water-King within 2 metres of it. This also applies to a hot water cylinder under mains pressure. Only the cold supply pipe should be treated.

Vented Hot Water Systems with Cold Water Storage Tank 

 Treated water delivered to a cold water storage tank will lose the effect of the treatment. Depending on water quality, this can happen very quickly. For this reason water is best treated after a storage tank. For best results we recommend two water-King units are fitted; one on the main inlet to the house (rising main) and one on the cold pipe that runs from the cold storage tank into the bottom of the hot cylinder (cold down service). If you decide to fit only a single unit, then you will get best value from it by fitting it on the cold down service. The signal is transmitted through the water and will treat all the water in the storage tank above it. If you have copper pipes that are cross bonded to the rising main, the taps fed from it should be adequately treated as well.


The Technology Explained

Water-King uses pre-programed micro-chips to transmit pulses of electrical charge into the water at varying frequencies and amplitudes. These “signals” cause some of the minerals in the water to form sub-microscopic clusters. When the water is then heated, the clusters act as nucleation seeds upon which the calcium carbonate (limescale) precipitates. Instead of the hard encrustation on pipes and heating elements that normally occurs when water is heated, the precipitation takes the form of tiny calcium carbonate crystals that float suspended in the water. These ultra-fine crystals are carried away with the flowing water.

How Is The Water Softened?

The nucleation seeds created by Water-King stimulate the conversion of more of the dissolved calcium bicarbonate in the water into crystals in suspension than would otherwise occur. The resulting hot water, with less calcium bicarbonate, is now chemically softer. Water-King is the only electronic device of its kind that has been proven by independent laboratory tests to produce softer hot water.

Drinking Water and Salinity

Unlike ion exchange softened water, where minerals are removed and replaced by sodium, Water-King treated water is good for drinking. There is no need for a separate drinking water supply, no health risks and no chloride effluent. It can be used for reducing scale in irrigation systems and food preparation facilities.

Removal of Existing Scale Deposits

Water-King is very effective at removing existing scale deposits from water heaters. Descaling occurs within a few weeks. The scale breaks away in flakes as it loses adhesion with the surface that it is encrusting. In existing systems that are already scaled up the use of strainers should be considered to reduce the problem that debris scale can cause. Mixing valves, aerators and shower heads can collect debris. Heat exchangers with restricted flow passages such as Geononi, Plate and Frame and MAXXflo are very vulnerable to debris and should be protected with strainers where possible.

Is Water King right for you?

Field trials conducted over the past fifteen years around the world have demonstrated the effectiveness of Water-King in most applications where conventional water softeners would normally be used. Water-King is less expensive to install and maintain than ion exchange softeners. In larger applications it is also less expensive and simpler to install than inline magnetic and electro magnetic systems. Water-King requires very little space, no special plumbing, no waste water connection nor access for the supply of salt and its storage. There is no head loss nor any additional corrosion problems.

Lifescience Products Ltd have been providing expert technical advice and market leading water treatment products for over 20 years.

Their Water-King electronic water softener is widely specified and installed by some of the UKs largest consultants and contractors on a range of projects from world famous stadia to landmark developments, like London’s iconic ‘Gherkin’ Building.

You too can benefit from this unique technology by ordering the easy to install Water-King WK1, a domestic version of the product designed specifically for the home-owner.

Lifecycle Costs

The running costs are negligible, no more than £10.00 per annum for domestic models. The design life is in excess of 25 years with a 5-year manufacturer’s warranty. Water-King comes with a no quibble 100-day money-back satisfaction guarantee.

Direct fired gas/oil boiler, maximum output

Water-King WK1- 35 kW

Electrical boiler maximum output

Water-King WK1 – 5kW
Water-King WK1-E – 12kW

Maximum pipe diameter

Water-King WK1 – 28mm
Water-King WK1-E – 42mm

Frequency range


Peak output voltage


Power supply


Input current

Water-King WK1 – 0.02A
Water-King WK1-E – 0.003A


140 x 85 x 50mm

EMC Directive

RTCG certify levels below CISPR / 14 & CISPR/22

Radio Agency

Approved Tariff No EN58505901009900-811

Boxed Weight

​Water-King WK1 – 0.55kg
Water-King WK1-E – 0.65kg

Humidity Non Condensing



Water-King WK1 – External
Water-King WK1-E – External

Power Requirements

Each unit requires mains voltage supply within one metre of the unit. The unit should be located within 45 cm of the pipe being treated.

Plumbing Requirements and Pipe Composition

Each Water-King aerial requires up to 6 cm of straight pipe. They can be fitted either side of bends on horizontal or vertical pipes. Water-King units can be fitted to pipes of any material except lead. The pipe does not need to be cut, there is no plumbing involved, nor is there any requirement for an isolating bypass with associated valves. Insulation may be fitted over the aerials after installation

Free UK delivery on all orders.

​Water-King orders are fulfilled by Royal Mail on their 1st Class Signed For service, delivery is expected to be 1 to 2 working days (including Saturday).

Purchases before 5pm, Monday to Friday, will be dispatch the same working day, any orders after this will be dispatched the following working day.

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