(The Electronic Anti-Scale System. The Green Alternative to Water Softeners)
  • The eco-friendly alternative to softeners against scale problems
  • In comparison to water softeners, It  don’t use salt or chemicals
  • Suitable for pipe diameters from 1/2″ to 20″ (~ 10-500 mm)
  • Fully cast in acrylic for optimal quality endurance
  • Do-it-Yourself installation without cutting the pipes
  • Works on every pipe material – iron, copper, stainless steel, galvanized iron, plastic, PVC, PE-x, compound pipes (any material mixture) etc.

Before & After the purafree!

Piping Joints

Before & After Purafree


Cooling Tower Grid

Before & After Purafree



Swimming Pool

Before & After Purafree




12 reasons why It is a good alternative to water softeners

It clearly stands out with its quality and performance. Please compare It as the alternative to softeners by matching some quality indicators:

24v-impulseGerman 24 Volt Impulse-Technology (capacitive): The water is treated with electric impulses that control scale in an eco-friendly “green” way. It is an electric system that is not magnetic-based.


It works on a frequency range between 3-32 kHz with different frequency peaks (wobbling distribution). The secret to the right performance of physical water treatment lies in the composition of these impulses. CWT has developed and fine-tuned them for over 30 years.


It uses customized isolated copper impulse bands. How the impulses are transferred into the water is crucial. The design of the bands increases the surface area that transports the impulses. This improves transmission by up to 40%.


The original acrylic cast is unique to the product line. It offers maximum protection against water, heat, dirt, coldness, humidity and keeps all parts secure and sealed in place.


It comes with external UL and TÜV-approved electronic switching adaptors. They operate with a very low power consumption of 100-240V and equalize possible power instability.


It is not magnetic-based. Therefore, it operates 100% independent of the velocity (water flow rate) in the pipe and constantly provides reliable impulses that guarantee the right output at all times.


Material-matching programs for different materials: It treats any pipe material. No need to buy a different product for metal, PVC, plastic etc. any more.



The automatic memory program keeps It running correctly. In case of the unlikely event of a power failure It automatically resets back to the last program once power is regained.


It holds numerous certifications by renowned international institutions: the German TÜV, the German CE, the UL-approval for switching adaptors etc.



It requires very little electrical power as it is very economical. The units operate with 1.75 to max. 3.25 Watt. The running costs are approx. $US 3-7 (~3-6 EUR) per year.

made-in-germanyMade-in-Germany: It is a German quality product that has been manufactured.



10-year international warranty is granted for all It units. Due to the special acrylic protection these units keep on running with a life expectancy of over 30 years.

Electronic scale protection – how does it work?

It is a physical water treatment system that does NOT use chemicals or salt. It does not change the chemical mixture of the water. Instead, it changes the physical characteristics of the scale crystals in a way that the scale particles lose their adhesive power. It does not need to have direct contact with the water and sits outside of the pipe.

It treats the water with electric impulse swhich are generated in the electronic unit and are controlled by a computerized micro-chip. The signal-frequencies are transmitted via the It -impulse-bands that are wrapped around the pipe. The bands interact as pairs and form a frequency-field that changes the crystals in the water as it flows by.

Scale causes many problems





  • Blocked piping systems
  • Dull surfaces and malfunctioning machinery
  • High costs for heating
  • High expenses for cleaning
  • Rust accumulation in the pipe that leads to corrosion
  • Bacterial growth in drinking water carrying pipes

Purafree is Eco Friendly, Economical, Comparing to the normal Softeners!

If you are interested with our products, Please send us your contact details, we wll get back to you for demo .

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