Fully functioning and compliant riser systems
Hydrants, or riser systems, are there to provide water for the fire service to fight a building fire on all floors. There are three main types: dry, wet and charged. Dry risers met a New Zealand standard that was superseded in 1978 and it is now recommended they be converted to a charged riser system. Wet risers are also now not normally installed in new buildings. By relying on our experience with all types of riser system you can be sure yours is fit for purpose, fully functioning and compliant.
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Dry riser
A vertical fire-fighting pipe, it has inlet connections at Fire Brigade access level and landing valves around the building. The pipe is normally dry and is charged with water from a fire appliance. Installed to NZS4510:1978, they are no longer permitted for new buildings and should be replaced with a charged riser system when practicable.
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Wet riser
Permanently charged with water from the mains, wet risers superseded dry riser systems after 1978. They are now not normally installed, being superseded themselves by charged riser systems.
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Charged riser
This type of hydrant main has inlet connections at Fire Brigade access level with outlets at various points. The riser is pressurised for testing via a small-diameter pipe connection. Water for fire-fighting is supplied from a fire appliance via the inlet connection.