Water mist fire extinguishing

Water Mist fire-extinguishing systems use high-pressure water mist to control or extinguish a fire. The Water Mist system is natural, non-toxic, completely environmentally friendly, efficient, and suitable for many possible applications.

Compared to conventional water fire-extinguishing systems, Water Mist systems effectively replace water discharge with a dense fine mist of water. This solution allows considerable cost savings both in terms of water and in terms of material damage in the event of a discharge. The extremely reduced amount of water used makes Water Mist an increasingly attractive and fast-growing fire-extinguishing system at this time of environmental concern.

The design of these systems aims to both control and extinguish fire by means of fine water mist, which also aids smoke and gas suppression and surface cooling. Despite the presence of water droplets, the use of Water Mist has been tested and is permitted even in areas where electrical power is present.

In order to ensure their effectiveness, it is essential that the checks required by the standards, which detail all the activities and maintenance schedules, be performed by specialised personnel.

Faro is the right pratner!

  • Expertise: we know the standards and propose the right solution
  • Reliability: we test all the products we offer
  • Care for the environment: we know how to handle waste and have developed a system of circular economy and reuse
The FARO Team

  • Our technicians receive continuous professional training
  • Our staff are direct employees, not subcontracted
  • We are very well acquainted with multi-site industrial, logistics, and retail operations
FARO is always there

  • Technical service on call 24 hours a day, 7 days a week
  • Direct phone support provided by our operators
  • Expert advice on all regulatory updates

Maintenance phases and frequency

Phase Frequency Situation
Initial inspection - Assumption
(responsible company)
Occasional Before delivery of a new or modified system or when assuming the maintenance of a system
Weekly According to the maintenance plan scheduled by the system manager
Corrective/Preventive and Emergency Maintenance
(responsible company)
Every six months / oltre i 5 anni According to the scheduled maintenance plan
Cylinder inspection Every ten years According to the scheduled maintenance plan

Documentation to be acquired prior to starting maintenance activities

  • User and maintenance manual;
  • As-built designs and documentation of the system;
  • T-PED certification for each cylinder;
  • Manufacturers' test procedure;
  • Test equipment;
  • Electronic instruments suitable for the tests to be performed.

Initial inspection

To be performed by the Maintenance Technician

Preliminary Inspection
  • Verification that the system corresponds to the executive plan; Installation in conformity with the standard;
  • Visual inspection of the system.
Functional Check
  • Verification that the system logics correspond to the project requirements and the operating documents as well as the user and maintenance manual;
  • In the presence of other interconnected systems (active or passive protection or technological systems), check that the system logics are consistent with the project requirements.


To be completed by the Assigned personnel

  • Visual inspection;
  • Checking the status messages on the control unit;
  • Check that the dispensers are correctly positioned and correctly connected to the control lines;
  • Check that any selector switches are positioned in the manner established by the system procedure.
  • Weekly.

Semi-annual inspection of systems with cylinders

To be performed by the Maintenance Technician

  • Every six months
  • Check that the initial inspection documents are on hand;
  • Check that no actions have been taken or structural changes made in the protected environment.
  • Removal of the electric actuator from the nitrogen pilot cylinder;
  • Blank tests of the system to check that the electrical control actuator is functioning properly, verifying that it has been triggered automatically by the fire detection system and manually by direct manual action;
  • Alarm collection centre system reset;
  • Check nitrogen cylinder pressure gauges, and replace or recharge cylinders with pressures below 180 bar;
  • Visual inspection of the condition of the equipment and the piping up to the nozzles;
  • Electrical actuator reset and reconnection to nitrogen cylinder. Restarting the system according to the commissioning procedures listed in the user and maintenance manual.

Annual inspection of electrically operated pumping systems

To be performed by the Maintenance Technician

  • Annual
  • Check that the initial inspection documents are on hand;
  • Check that no actions have been taken or structural changes made in the protected environment.
  • Tank cleaning;
  • Cleaning of filters or their replacement, if necessary.

Cylinder inspection and testing programme

To be performed by the Maintenance Technician

  • Cylinders that have been installed in the system and that have never been used are legally required to be inspected and tested every 10 years;
  • Cylinders that require refilling and for which more than 5 years have elapsed since the last refilling or testing must first be hydrostatically tested.
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