This lime scale prevention method is based on the creation of randomly changing electrical fields that are induced in the water and distributed throughout the pipe system. This system holds US & Worldwide patents. This leads to the formation of crystallized nuclei everywhere in the system. When the water is heated, the hard salts in the water (those which usually settle as lime scale that builds up on the walls) grow as a suspension and are washed away with the water flow. The electric field that forms in the area of contact between the water and the pipe repels the lime scale crystallized nuclei and prevents them from settling on the walls.
The induction of the electric field is accomplished without intervention in the pipe system and is based on an accessory that is mounted around it. The electrical field is transferred by the pipe system and water themselves. The impact of the process is continuous, independent of the water flow (yet the intensity of the field changes according to the intensity of the flow) and does not require the addition of chemicals or salts.
As a result of high costs it had incurred from lime scale damage to instant water heaters, British Gas conducted a long-range experiment in which it compared several lime scale prevention devices. As part of the experiment, the method of action and structure of the devices were described. Only devices whose operation does not require the addition of chemicals or salts to the water were tested.The experiment results revealed a clear advantage to the HydroCare: All systems treated by devices other than the HydroCare, clogged within 40 to 100 weeks, while the HydroCare unit lasted for over 200 weeks.
HydroCare is different from other devices of its kind in terms of the following:As it was pointed out at the beginning, the theoretical background and the research carried out by British Gas Company indicate a device that can contribute greatly to the prevention of lime scale in hot water systems.
The device prevents lime scale and reduces the damage it causes, extending the life cycle of standard home appliances and hot water systems. It increases the efficiencies and dramatically reduces energy cost.
The most important feature of the HydroCare technology that sets it apart from that of any competing technology, is the efficient manner by which the electric field is directionally generated through the entire water system. This unique advantage, protected by international patents, singularly delivers consistently beneficial results in industrial, commercial, and domestic applications.
Most plumbing systems must be regarded as an open circuit from the electrical point of view. It would be impractical and expensive to form a reliable circuit from a domestic or industrial plumbing system whereby an electrical current flows through every section of the plumbing system.
To generate a reasonable flow of electrons in an open circuit conductor, it is necessary to provide a source of high frequency to a conductor that is long enough to generate a standing WAVE voltage over its length.

Fig.1 shows a sign WAVE of 200 KHz. The WAVE length is 1500m, the 1/4 WAVE length is 375m. A domestic plumbing system including the feed pipe, central heating, cold water and hot water is about 60 m.
If the source is 10V then the standing WAVE voltage will be [sin((60/375)*90)]*10 = 2.49V between one end of the plumbing system and the other. This voltage difference between the extremities of the plumbing system is caused by a substantial flow of electrons from one end to the other of the system.

Fig.2 represents the position at T1 on Fig.1 and Fig. 3 represent the position at T2 on Fig.1. To achieve this flow of electrons in the plumbing system a voltage must be generated in the water in the direction of the pipe. This is achieved by utilizing a high frequency transformer. This transformer consists of a ferrite ring around the water pipe. A primary coil is wound around the ferrite ring. Any conductor, the water and the pipe (if it is a conductive material) will form parallel secondary windings of the transformer. The signal that is fed to the primary coil is a high frequency diminishing WAVE with random wait periods. This WAVE is designed to allow the formation of seed crystals for a variety of crystal forming salts that may be present in the water.
Fig.2 and Fig.3 illustrate the diminishing WAVE and the voltage V over the plumbing system at specific times marked T1 and T2 in Fig.1, as well as the position of the electrons, and the positively charged atoms in the conducting water (and pipe), at maximum voltage position. V is the voltage generated by the ferrite ring and, I is the accelerated charge generated due to the standing WAVE.
It is this acceleration that forms the electromagnetic field. The electric component is responsible for the generation of nuclear clusters that act as seed crystals to prevent the formation of encrusting scale.