Fire extinguishing systems based on water are the most widespread extinguishing systems constantly. Water still remains the most important and most spread extinguishing agent - it is cheap, adequate volumes are available, it is easy to be pumped and it represents no hazard to the environment. Fire extinguishing effect of the water is based on its ability to absorb the heat.

Sprinkler fire extinguishing systems
Sprinkler fire extinguishing systems is the self-actuated equipment activated by temperature. Sprinkler head opens automatically when so called opening temperature of the thermal cut-out is reached (about 30 °C above the maximum operation temperature of the surrounding). This causes the pressure decrease in distribution pipe-line. Opening of the control valve follows and sprinkler fire extinguishing system starts to work. After the sprinkler head opening water flows in form of shower. Opened will be only those heads which are above the centre of fire or close to it, it means those only whose functioning is necessary for fire extinguishing. Wet system of sprinklers is the most utilized sprinkler system with wide possibility of utilization to protect the warehouses, office rooms, industrial and commercial objects and everywhere where the designed system is not endangered with frost. Wet system provides the reliable operation, long operating life and extraordinary simple maintenance. Dry sprinkler system is applied to the environs endangered by frost, such as not heated storage spaces, loading ramps, barns, etc. Unlike the wet system is the dry system filled with pressure air from the control valve on.

Deluge fire extinguishing systems
Deluge system with opened spray heads (without thermal cut-out) provides the swift full-area fire extinguishing of rooms with high fire hazard and with high speed of fire propagation or for the protection of technological equipments such as in chemical, paper or textile industry. Initiation of the fire extinguishing is possible manually and automatically either by the means of thermal cut-out (hydraulic or pneumatic activation) or by the means of an electric fire signalling.