Scale Prevention

As little as 1.6mm of scale build-up reduces boiler efficiency by as much as 11%; increasing
energy costs and exposing costly appliances to scale damage. Calmag Water Conditioners offer a low cost solution to limescale prevention when water softening is not required.

Typical Users

  • Local Authorities
  • Schools
  • Housing Associations
  • Sheltered Housing
  • Leisure Centres
  • Prisons
  • Nursing Homes
  • HM Forces Accommodation
  • Factories

Typical Uses

  • Calorifiers and hot water heaters
  • Direct gas fired water heaters
  • Copperfin water heaters
  • Plate heat exchangers
  • Combination boilers
  • Thermal Store boilers
  • Electric showers
  • Water coolers


The Electromag water conditioner provides industry with a cost effective solution for treating problems with hard scale. Electromagnetic technology effectively reduces existing limescale, preventing new scale build-up, whilst enhancing heat transfer efficiency. Electromag units are available in a range of sizes with low running costs and no maintenance needed.

The degree of severity of water hardness can vary, depending on where you live and the amount of hard scale minerals present in your water supply. 60% of the UK is in a hard water area which affects businesses alongside domestic properties. If you are suffering from problems with hard scale, you will probably recognise some of the tell tale signs:


  • Prevents limescale build-up
  • Reduces existing limescale
  • Improves system efficiency
  • Protects heating appliances
  • Low running costs
  • Suitable for many applications
  • Range of sizes available
  • No chemicals
  • No maintenance required

Product Range

  • E22 – 22mm
  • E28 – 28mm
  • E35 – 35mm
  • E42 – 42mm
  • E150 – 1.5″
  • E200 – 2″
  • E300 – 3″
  • E400 – 4″

WRAS approved, click to view

Click to view Electromag specification and installation details


CalScale offers a non-intrusive solution for reducing and preventing limescale build-up in systems and plumbed-in appliances. CalScale’s modulated pulse current generates an electromagnetic field through pipework, resulting in a complex oscillating field, capable of overcoming variations in water flow, temperature and levels of dissolved calcium. With the choice of three power settings, CalScale is highly recommended for effective scale reduction and prevention, combined with ease of installation and use.

How it works

Plugged in to the main electrical supply, CalScale draws power to the main control unit where it generates, via the signal cable wound around the water pipe, a modulated pulsed current that forms an electrical field through which the hard water has to pass. Due to the variations in water flow, temperature and the amount of calcium dissolved, the electronics thus produces a complex oscillating field that will cover all the necessary descaling conditions.

CalScale will not only prevent further limescale build up, but will also reduce, and finally clear all existing hard water limescale build up already present in the system or in heating appliances.


  • Prevents limescale build-up
  • Reduces existing limescale
  • Improves system efficiency
  • Protects heating appliances
  • Low running costs
  • Suitable for many applications
  • No chemicals
  • No maintenance required


  • Height: 165mm
  • Width: 190mm
  • Depth: 140mm
  • Voltage: 220V /240V 50Hz
  • Rating: 6 VA
  • Max flow rate: 420 litres per min
  • Housing: IP65 rating
  • Pipe size: up to 100mm

Product links

Our credentials

For all your Sales and Technical enquiries please call direct on +44(0)1535 210320

View the Commercial Water Softeners brochure

Installation and specification guide

Click here to see our case studies