Provision of Hydrants
5.1.7 The following buildings should be provided with one or more external fire hydrants, complying with the requirements of BS 750: 1984 Specification for underground fire hydrants and surface box frames and covers, and
with any specific requirements of the relevant fire authority:
- every building provided with an internal fire main, wet or dry;
- every building having a floor area on any storey of more than 1000 m²;
For buildings, or groups of buildings, exceeding 1000 m² in ground floor area, at least one hydrant should be provided for every 1000 m² of the area covered at ground level.
Fire hydrants should be located as shown in Diagram 30 and such that:
- the distance from the building is not less than 6 m or more than 46 m;
- the distance from a hydrant to a vehicle access roadway or hard-standing area for fire appliances (see 5.2) is not more than 30 m;
- they are distributed around the perimeter of the building, having regard to the provision of access for fire appliances (see 5.2): and
- the hydrants are located on the same site as the building or are provided by a sanitary authority on a public roadway adjacent to the site.
A hydrant situated inside a building may also be acceptable where it is:
- in a separate fire compartment i.e. separated from the rest of the building by compartment walls;
- not more than 4.5 m and visible from an entrance to the building; and
- indicated by a suitable notice at the entrance.
All hydrants should be conspicuously marked in accordance with BS 3251: 1976 Specification of indicator plates for fire hydrants and emergency water supplies.
Diagram 30 External fire mains and hydrants