Dry Risers & Fire Hydrants
Harrold-Jones Services provide scheduled maintenance and testing to wet and dry rising fire mains and fire hydrants in accordance with BS9990. Fire Brigade equipment can also be supplied.
Dry and Wet Rising Mains
Dry and wet rising mains are intended for use by the Fire Brigade or other trained personnel. They provide a readily available means of delivering considerable quantities of water to extinguish or to prevent the spread of fire.
Dry risers are vertical mains fitted into staircase enclosures or other suitable positions, with outlet valves on each floor and inlets at ground level to enable the fire brigade to connect to the water supply.
Wet risers are pipes that are kept permanently charged with water, either from a storage tank (via a boost pump) or direct from the mains water supply.
Dry Riser Inspection & Maintenance
Harrold-Jones Services operates with a purpose-built dry riser testing vehicle. Testing is carried out annually by our skilled technicians and also includes the six monthly visual inspections as required by BS9990. Our technicians cordon off the areas affected by the testing, making it safe and then inspect the system mechanically prior to the system being filled and pressurised. Once the dry riser system has been tested, we drain the system, making it secure with padlocks and straps, and then issue the appropriate certification.
Underground hydrants also require regular inspection and occasional maintenance to ensure that they will work in an emergency. Since 1989, it has been the responsibility of a building’s owner / occupier to keep its hydrant systems in working order.