Issue 24 – February 2011
Standards New Zealand recently published a new Standard for Underground fire hydrants NZS 4522:2010. NZS 4522 promotes the manufacture, supply, and use of fire hydrants with consistent high performance, long life, and low maintenance requirements, and provides guidance on their installation.
- outlines the design, material, manufacture, and installation requirements for underground fire hydrants used in New Zealand, is specifically designed for New Zealand conditions, and cross references other local and regional Standards currently in use
- covers screw-down and gate valve underground fire hydrants used in New Zealand
- includes changes from the requirements of NZS/BS 750 (the Standard previously used), to reflect recent changes to hydrant manufacturing practices and technologies.
The NZS 4522 development committee considered adopting a number of international Standards (including BS 750), but instead, made the decision to develop NZS 4522. Australian firefighting hardware differs from that used in New Zealand and the new British Standard is now interlinked with several EU Standards.
The main function of fire hydrants is to provide an adequate firefighting water supply to the New Zealand Fire Service during fire emergencies, although fire hydrants are also used for a wide range of operational purposes. Firefighting water supplies are specified in SNZ PAS 4509. NZS 4522 specifies hydrant performance criteria that allow for the delivery of such water supplies through a screw-down hydrant with a standard hydrant standpipe fitted, and where the water reticulation system is operating at adequate minimum pressures and flows.
NZS 4522 supersedes NZS/BS 750:1984 Specification for underground fire hydrants and surface box frames and covers.
→ Buy NZS 4522:2010 Underground fire hydrants
- SNZ PAS 4509:2008 New Zealand Fire Service firefighting water supplies code of practice