- Weekly testing of Alarm Valves and Fire Pumps
- Quarterly service including flow switch inspection and testing
- Monthly Testing
- 6 Monthly Bi-annual (Minor) inspection and service
- 12 Monthly Annual (Major) Inspection and service
- 36 Monthly Tri-annual Inspection and service
- 25 yearly inspections
- Foam sample Testing
- Pump house & water supply checks (exercising valves, pressure switches, Non-return valve checks)
- Weekly testing of fire pumps
- 6 Monthly service (minor) of fire pumps drivers
- 12 monthly service (major) of fire pumps drivers (including oil, filter, coolant, coupling condition, multi point flow tests, battery checks and top ups)
If you own, manage or reside in a building where any floor is over 18 metres above ground level and below 50 metres in height then the installation and maintenance of a dry riser system is required.
If the building is over 50 metres high then a wet riser system is required.
How does a riser system work?
A dry riser system is a network of pipework and valves that allow the fire service to easily and quickly deliver water to upper floor levels. The maintenance of these pipe networks and associated valves is essential to ensure they do not leak, can maintain the pressures required for firefighting and are accessible for quick and easy connection.
Ensuring the fire and rescue service have fast access to water supplies throughout your premises is one of the most effective ways of fighting fire. The fire service will use their own tender (fire engine) to charge a dry riser pipework full of water. They will then connect their hoses to each outlet valve on each floor to fight the fire at each level. This quick and easy way of water distribution saves time and is a safer way to fight fires, ensuring the fire is more easily contained and quickly extinguished.
What is the difference between a dry and wet riser?
- A dry riser system is designed to be charged with water by the fire brigade.
- A wet riser system is kept full of water via water tanks and pumps.
Servicing and Maintenance
We offer servicing and preventative maintenance for all dry riser systems in accordance with BS9990:2015 Code of Practice for Non-Automatic Firefighting Systems in Buildings.
British Standards recommend that service visits should be carried out every 6 months. Every year one of these service visits is a major service (also known as a wet test) which would include more comprehensive tests such as the hydraulic pressure test. The remaining test is a visual inspection, which due to the accessibility of dry risers and their vulnerability to vandalism, is highly recommended.
A sample of maintenance checks we carry out is as follows:
Major Inspection & Test
Hydraulic pressure tests of the pipework – this tests for leaks by pressurising the pipework to 10bar for 15 minutes
Inspection of the pipework while filled with water and under pressure
Visual inspections as below
Check all outlet valves
Check all outlet valve washers
Check access hatches and doors
Check all inlet valves
Check all inlet valve gaskets and washers
Check for damage and vandalism which may affect operation
Check cabinet glass
Check cabinet for corrosion/damage
Check all valves open/close
Check inlet breeching valve springs and rubbers
Check signage is present and to latest Standard
Following any service / call out visit, all our clients are issued with a detailed site report highlighting any recommendations required to keep your Dry & Wet risers in their very best condition.
The various types of fire extinguisher put out fires started with different types of fuel – these are called ‘classes’ of fire. The fire risk from the different classes of fire in your business premises will determine which fire extinguisher types you need.
You will also need to make sure that you have the right size and weight of fire extinguisher as well as the right kind.
Whilst there are 5 main types of fire extinguisher, there are different versions of both the Water and Dry Powder extinguishers, meaning there are a total of 8 fire extinguisher types to choose from. The 8 types of fire extinguisher are:
There is no one extinguisher type which works on all classes of fire.
Below is a summary of the classes of fire, and a quick reference chart showing which types of extinguisher should be used on each.
There are six classes of fire: Class A, Class B, Class C, Class D, ‘Electrical’, and Class F.
The Importance of Fire Alarm Maintenance
Under legislation employers have a legal obligation to ensure that their fire alarm system and fire detection system is in good working order and adheres to all relevant regulatory standards. This means it’s essential to have an adequate fire alarm maintenance schedule in place.
To help businesses comply with current legislation we offer a comprehensive fire alarm maintenance package; a full fire alarm system servicing by a maintenance engineer. This is backed up by a 24-hour emergency engineer service.
Under legislation the minimum requirement is that a fire alarm and fire detection system is serviced by a competent person on a six-monthly basis. However, the frequency of maintenance engineer visits can be increased to suit the size of the fire alarm system, building or environment. Your alarm systems are important and we offer the ideal package to ensure that they perform to their full ability at all times.
Our fire alarm maintenance engineers will:
- Test every manual call point and / or zone at each visit
- Test every heat and smoke detector
- Inspect every detector for damage and obstructions
- Check analogue values of all sensors for contamination
- Test the battery for condition and correct standby period
- Check that the zone plan is accurate
- Check alarm functions and visual indicators on control panels
- Check the operation of remote signalling to the alarm receiving centre (where applicable)
- Check that the cause and effect automatic actions occur e.g. lifts go to the bottom floor, gas supplies are shut off etc
- Investigate any reported false alarms in the log book and correct as necessary
- Issue a service certificate
Water mist fire suppression systems were originally developed as an alternative to Halon based fire suppression systems for storage areas and machinery enclosures in ships and various commercial applications.
These systems performed well in situations where there were no design variables like opening windows or varying fire loadings and where doors would generally be kept closed etc… These systems have since been utilised in land based commercial situations like engine rooms, local asset management of electronic equipment, commercial kitchens, turbine systems etc.
More recently, water mist fire suppression systems have been considered in residential situations and a number of low pressure residential and domestic mist systems have been installed throughout the UK.
What is the difference between a Water Mist fire system and a conventional fire sprinkler system?
It is known that water droplets evaporate when applied to a fire and the resulting steam reduces the concentration of oxygen close to the fire which in turn interrupts the chain reaction necessary for a fire to establish itself. This is the process for any sprinkler system.
However, Water Mist suppression systems improve on this process by producing a finer mist than a standard fire sprinkler nozzle. A fine mist is a very effective way of ensuring that water evaporates quicker, slowing down the combustion process even more effectively than a conventional fire sprinkler system. In order to achieve a finer spray, mist systems operate at a higher pressure than standard conventional sprinkler systems and in most situations can be as effective if not more effective than a conventional residential fire sprinkler system despite the reduced quantity of water used.
We at Thor Fire hold a wealth of experience servicing and maintaining Water Mist systems to BS-8489, we appreciate that clients Water Mist systems may develop faults during the periods between services and as such we offer a very reactive 24/7 call out service spanning nationwide. All of our service vans are fully stocked with spares in order to get your system back online and fully operational.