The internal tank is made from high quality steel;
internally coated with a layer of hydra 
Stone to prevent rust and corrosion and increase the tank's durability.
 The stone coating is treated to suit different water qualities; with proven success in case of salty water inlet.
The heating element is made from the finest material that enables quick conductance of heating energy.  A thermostat is provided to guarantee full control over water temperature. 

Safety Measures:  The thermostat safety prevents the water from reaching excess temperatures.  In case of water cut off, a Non-Return and Safety valve maintains hot water inside the heater and prevents it from returning back into the pipes. This is for your own safety and also to preserve the heater!  In case of internal high pressure, the valve balances water pressure between the heater and the water supply, thus providing even more safety. Energy Saving:  A layer of eco-friendly polyurethane insulates the internal tank from the outer casing; to preserve hot water temperature for a longer time and reduce energy consumption.