Fire Hose Reel (RIA): Standards, Specs & Installation
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Fire hose reel (RIA): everything you need to know for effective fire protection
A fire hose reel, known in France as a RIA (robinet d'incendie armé), is a fixed firefighting device that allows any building occupant to take immediate action without waiting for emergency services. It consists of a semi-rigid hose connected to a permanent water supply, fitted with a nozzle at the end. Easy to operate, it serves as the first line of attack against fire in many buildings open to the public or used as workplaces.
In this article, you will find the technical specifications required by regulation, the installation rules that must be followed, the mistakes that undermine a building's fire protection, and what truly sets a fire hose reel apart from a fire extinguisher in an emergency situation.
What is a fire hose reel and how does it work?
A fire hose reel is a first-response firefighting device permanently connected to the building's water network, ready to use without any complex handling. The user unrolls the hose, opens the valve and directs the nozzle toward the fire.
This device differs from other first-response means by its ability to discharge water continuously, with no time limit tied to a finite charge — unlike a fire extinguisher. As long as the supply network is pressurised, the hose reel can operate.
It consists of three main components: an axial or swivel-feed reel drum, a semi-rigid hose made of polyester or rubber, and an adjustable multi-pattern nozzle. The entire assembly is housed in a wall cabinet, typically red in colour, easily identifiable even in early-stage smoke conditions.
Basic use requires no specific training. This is precisely what makes it one of the most widely deployed devices in buildings open to the public, warehouses, healthcare facilities and high-rise buildings.
Nominal diameters and regulatory flow rates for fire hose reels
French regulations specify precise nominal diameters for fire hose reels, directly linked to the building's risk level and required water flow rates. The decree of 25 June 1980, in its article MS 16, defines three possible configurations: DN 19/6, DN 25/8 and DN 33/12.
These value pairs correspond respectively to the internal hose diameter in millimetres and the nozzle orifice diameter. The choice of diameter directly determines the flow rate and jet range.
Effective range by nominal diameter
Full-jet ranges vary significantly from one diameter to another. According to the INERIS synthesis document on technical safety barriers (2004), a DN 20 fire hose reel provides a full-jet range of approximately 12 metres. A DN 40 unit reaches 20 metres under the same operating conditions.
These figures are fundamental when calculating installation coverage. Undersizing the diameter in a deep room leaves uncovered zones, which constitutes a direct regulatory non-compliance.
Minimum flow rate required by the Construction Code
The French Construction and Housing Code sets the minimum flow rate that each outlet must deliver at 250 litres per minute. This threshold ensures that the jet produced has sufficient force to reach and effectively combat a nascent fire. Below this value, the hose reel may physically operate but no longer meets the regulatory requirement.
Minimum pressure and hydraulic conditions for a compliant fire hose reel
The minimum operating pressure for a fire hose reel is set at 2.5 bar at the most disadvantaged point on the network — that is, the valve furthest from or highest above the supply source. This requirement is set out in article MS 17 of the decree of 25 June 1980.
This 2.5 bar figure refers to the residual pressure measured while the hose reel is in operation, not to the static pressure of the network at rest. The distinction is critical. Many facility managers confuse static pressure with dynamic pressure, leading to installations that appear compliant on paper but fail as soon as the valve is opened.
The role of booster pumps in maintaining pressure
In high-rise buildings or buildings with low mains pressure, installing a booster pump is essential to maintain the required 2.5 bar at every point on the network. This pump must be redundant in high-risk facilities, with a backed-up power supply.
A correctly sized network also incorporates pressure loss calculations across the entire grid. These calculations, carried out by a specialist engineering firm, ensure that residual pressure remains compliant even when several valves are opened simultaneously.
Where to install a fire hose reel in a building: placement rules
The placement of a fire hose reel within a building follows strict spatial coverage rules, defined to ensure that no area remains out of reach. The founding principle is straightforward: every point in the building must be reachable by at least one hose jet, and by two jets in areas presenting significant risk.
This dual-coverage requirement in high-risk areas is explicitly stated in article MS 17 of the decree of 25 June 1980. It requires a tighter spacing of hose reel cabinets in areas storing combustible materials, technical rooms or production workshops.
Positioning and accessibility of cabinets
Fire hose reel cabinets must be positioned near the access points to the areas being protected, not at their centre. In the event of a declared fire, the occupant must be able to reach the cabinet before encountering flames, then advance toward the fire with the hose unrolled.
The mounting height of the control valve is also regulated: it must remain accessible to a person standing upright, with no obstruction. A cabinet blocked by furniture or sealed off by improvised storage constitutes a serious failure during a regulatory inspection.
Signage and integration into the evacuation plan
Each fire hose reel cabinet must be marked in accordance with safety signage standards, using a standardised pictogram. The location of all hose reels must appear on the evacuation plans posted throughout the building, so that occupants and emergency services can locate them immediately.
Fire hose reel vs. fire extinguisher: what is the practical difference?
Both the fire hose reel and the fire extinguisher are first-response firefighting tools, but their operational capabilities differ fundamentally in terms of duration, range and flow rate. A fire extinguisher holds between 6 and 12 litres of extinguishing agent, usable in 15 to 60 seconds depending on the type. A hose reel fed by the mains network has no time limit on use.
A fire extinguisher is better suited to a highly localised fire on a small surface area, attacked within the very first seconds. It is mobile, usable in any confined space, and requires no prior installation. Its main limitation is its finite volume: once empty, it is unusable.
The fire hose reel, on the other hand, enables a sustained attack over a longer period, covering a larger area thanks to its range of 12 to 20 metres depending on diameter. It is more effective against fires that have already grown in intensity, or in areas where the risk of rapid spread is high.
In buildings open to the public, both pieces of equipment are often complementary and both are required by regulation. The extinguisher is used for an immediate first strike; the hose reel takes over if the fire is not controlled within a few seconds. Choosing one over the other is not a regulatory option in most contexts.
Common mistakes in fire hose reel management and their consequences
Two mistakes recur systematically during fire hose reel compliance audits, with direct consequences for the effectiveness of fire protection and for the legal liability of the facility manager.
Neglecting mandatory periodic maintenance
The first mistake is the absence of periodic maintenance. An unmaintained hose reel may have a hose that has become stiff, cracked or twisted, a blocked nozzle or a seized valve. At the time of intervention, the equipment is unusable. Regulations require annual inspections by a qualified technician and flow tests at regular intervals. This maintenance is not optional: failure to carry it out exposes the facility manager to criminal liability in the event of an accident.
Underestimating pressure loss when extending the network
The second mistake involves network extensions carried out without hydraulic recalculation. When a building is enlarged or reconfigured, additional hose reels are sometimes connected to the existing network without any hydraulic verification. The result: residual pressure at the most disadvantaged point drops below 2.5 bar, rendering the entire network non-compliant — including the original installations. This type of failure is difficult to detect without on-site instrumented measurements.
A real-world case: bringing an under-pressurised fire hose reel network back into compliance
A2S FIRE was called in to assess an industrial facility whose fire hose reel network, originally designed for 4 cabinets, had been extended to 11 intervention points following two successive building extensions, without any hydraulic recalculation.
On-site dynamic pressure measurements revealed a residual pressure of 1.1 bar at the most disadvantaged point — less than half the regulatory threshold of 2.5 bar. Several valves were producing a flow rate below 80 litres per minute, well below the required 250 litres per minute.
A2S FIRE conducted a full hydraulic study, then installed a dedicated booster unit and reconfigured the network grid. Upon completion of the works, dynamic pressure at the most disadvantaged point reached 2.8 bar, with a measured flow rate exceeding 270 litres per minute across all 11 points. The facility achieved documented compliance in under six weeks.
Frequently asked questions
What is the minimum pressure required for a fire hose reel to comply with regulations?
The minimum regulatory pressure for a fire hose reel is 2.5 bars at the most unfavorable point in the network, meaning the furthest or highest tap from the water supply. This requirement, established by Article MS 17 of the decree of June 25, 1980, corresponds to the residual pressure measured when the fire hose reel is in operation, not the static pressure of the network at rest. In high-rise buildings or those with low public network pressure, installing a booster pump is essential to maintain this regulatory pressure at every point in the network.
What is the minimum mandatory flow rate that a fire hose reel must provide?
The minimum mandatory flow rate for each fire hose reel is 250 liters per minute, according to the French Construction and Housing Code. This threshold ensures that the water jet has sufficient force to reach and effectively combat an incipient fire. Below this value, the fire hose reel may physically function but no longer meets regulatory requirements. This flow rate must be maintained even when several taps are opened simultaneously in the network, which requires pressure loss calculations performed by a specialized engineering firm.
What is the main difference between a fire hose reel and a fire extinguisher during a fire intervention?
The main difference lies in the duration of use and intervention capacity. A fire extinguisher contains between 6 and 12 liters of extinguishing agent usable in 15 to 60 seconds, while a fire hose reel, permanently supplied by the water network, has no time limit for use. The extinguisher is better suited for a very localized fire attacked within the first seconds, whereas the fire hose reel allows sustained attack over a longer duration and wider perimeter thanks to its reach of 12 to 20 meters depending on diameter. In public buildings, both pieces of equipment are complementary and often simultaneously required by regulations.
What are the regulatory nominal diameters for a fire hose reel and what is their reach?
French regulations impose three possible configurations defined by the decree of June 25, 1980: DN 19/6, DN 25/8, and DN 33/12. These values correspond to the internal diameter of the hose in millimeters and the diameter of the nozzle orifice. The full jet ranges vary significantly according to diameter: a DN 20 fire hose reel provides a reach of approximately 12 meters, while a DN 40 fire hose reel reaches 20 meters under the same conditions. The choice of diameter directly determines the flow rate and jet reach, and must correspond to the building's risk levels to ensure complete coverage of areas to be protected.
How frequently must maintenance be performed on a fire hose reel?
Fire hose reel maintenance must be performed annually by a qualified technician, in accordance with current regulations. This mandatory periodic inspection includes regular flow tests and helps detect potential failures such as a stiffened, cracked or twisted hose, a blocked nozzle, or a seized valve. The absence of maintenance exposes the fire hose reel to being unusable at the critical moment of intervention and engages the criminal liability of the facility manager in case of accident. This obligation is not optional and constitutes a fundamental regulatory requirement to guarantee the effectiveness of the fire protection system.
