Hydrants & Risers
Fire hydrants, wet and dry riser systems
In order to effectively fight a fire, the fire and rescue service needs an instant and localised water supply.
Whilst a water mains system exists throughout the UK, there are many occasions when specifying additional systems might be advised. This could be due to the location of your building, its height, or its purpose.
Fire hydrants for inaccessible buildings
Some buildings can be difficult for the fire and rescue service to access.
For example, a tall building tucked behind another, accessed via a narrow road. Fire engines will only get as far as the main road.
In this situation, by installing a fire hydrant next to the building, fire crews can carry their hoses and quickly work from closer proximity.
If you’ve been advised to install a fire hydrant, we can help.
Designed in accordance with BS 9990:2006, your fire and rescue service can use our fire hydrant systems with BS 750 Type 2 hydrants fitted in valve pits. We’ll also install safety signs and suitably marked covers.
If you have your own fire brigade and use American-style connections, we can utilise surface mounted pillar hydrants for your system. We install them in accordance with NFPA and Factory Mutual Global rules.
Dry riser systems
Sometimes specified before fire sprinklers, you can install dry riser systems into buildings up to 50 metres high.
Fitted into the fire shafts, each floor has valves allowing the fire and rescue service to directly access the system. On demand, the system pushes water up the dry risers and rapidly dispersed on a particular floor.
In this way, fire hoses don’t have to wind their way up many flights of stairs – the water is accessed as close to the fire as possible, whilst people can safely exit the building.
A two-way inlet breeching connection for every outlet forms part of the dry riser installation, enabling fire appliances to securely connect and dispense water rapidly.
Wet riser systems
Taller buildings (above 50 metres) require wet riser systems so water can be quickly pumped to higher floors. At these heights, standard water supply pressures are not sufficient to operate fire appliances.
Pipes feed through the pipe shafts with pressure regulated values fitted on each floor. The system connects to a pump (sometimes two) so that it is fully charged with water at all times. The fire fighters then connect their hoses directly to the valves on the relevant floor, tackling the fire from a secure bridgehead.
Designing the right wet riser system for your building is complex. It’s important to specify the right pump configuration to achieve optimum water pressure and ensure the system is fit for purpose. As an LPCB Level 4 accredited fire company, we’ve got the knowledge to ensure you get this right.