Regardless of how water enters our house for domestic needs, whether it is a city network or an individual source of water supply( well, well), it has a certain stiffness. Namely, in it are dissolved chemical compounds of alkaline earth metals. These salts are able to assemble into stable forms. The catalyst for the process of their crystallization is a high temperature. As a result, scale is formed in the water heater, plaque in the electric kettle and in other appliances using water heating with the help of thermoelectric heating elements( TETs).
Signs indicating that the boiler was not scaled for a long time was: 
- Increase in the period of heating of the water volume;
- Occurrence of extraneous noise during operation;
- The monthly electricity consumption significantly increases;
- The liquid temperature does not reach the temperature set on the thermoregulator;
- The safety valve is often triggered, which indicates unauthorized overheating.
Periodic maintenance of water heaters can be performed independently for this, it is required to clearly understand the algorithm of work. Initially, it is necessary to disassemble the device, having previously disconnected it from the electricity network and the water supply system. It should be taken into account that the outlet pipe can not provide the maximum output of the liquid when cleaning the storage water heater, this is because the hot water intake in the hot water tank is made from above. Therefore, emptying is carried out through the supply of cold water. A safety valve is necessarily screwed together, since it acts in parallel as a check valve. This achieves the immersion of TEN in the liquid and the prevention of its premature failure.
Effective washing of boilers is possible only with the complete removal of the flange, on which the heating elements are fixed. Different manufacturers can use a different number of fastening bolts, but they all use a gasket. It can be rubber or silicone. When the flange is removed, carefully monitored so as not to cause mechanical damage to this part. Otherwise, during assembly, it will be impossible to achieve the tightness of the tank.
Further, cleaning of the storage water heater continues in a horizontal position. Under the pressure of water, walls are washed, while rags are used. Do not use metal nets for washing dishes, as the internal surface of the tank is enameled and such cleaning of the water heater will soon lead to the destruction of the sheet metal from which the tank is made.
Particular attention is drawn to the bottom of the tank. Scale, as a rule, settles to the bottom.
Visually demonstrates how the Ariston video is cleaned, with a really embodied sequence.
After cleaning the boiler with your own hands, proceed to flushing the parts on the dismantled flange. It is easy enough to put in order the copper sleeve, into which the element is placed to remove the temperature readings necessary for correct operation of the thermostat. The heating elements themselves are much harder to clean, and cracks should not be allowed on them. If after washing the heating elements, mechanical damage to their surface will be detected. It is necessary to replace the heating elements with new ones, which are purchased in service centers or on profile Internet sites. 
For leveling the negative impact of wandering electrical charges( Foucault currents), a magnesium anode is provided in the boiler. It collapses in the course of long-term operation, taking over the discharges. When servicing the boiler, it is necessary to provide for its replacement. The anode is fastened by thread M4, M6.Screwed clockwise, respectively, dismantling is carried out in the opposite direction.
After the cleaning of the boiler has been carried out by hand, they pass to the assembly of the water heater in the reverse order. The flange part is assembled in hands, and then it is fixed through the gasket to the tank. It is important to tighten the nuts with sufficient force to prevent leakage. Equally important is filling the device. For this, a tap with hot water is opened at any point of consumption, and wait until a jet appears.
Once again, visually checking the tightness of all investment connections and making sure that there are no drops on the bottom of the boiler, connect it to the electrical network. Thus, routine maintenance of the water heater cleaning of the video about which it is presented, allows not only to extend the service life of the device, but also to increase its productivity. With the same energy consumption, a serviced boiler can heat up more water, and its thermostat will more accurately meet the specified parameter.
