Specification for underground fire hydrants and surface box frames and covers Ingestion-build-180956 What is BS 4479-9 -

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Specification for underground fire hydrants and surface box frames and covers Ingestion-build-180956 What is BS 4479-9 -1 Scope This British Standard specifies the operational and health and safety requirements for underground fire hydrants conforming to the dimensional, material and performance requirements of BS EN 14339 and BS EN 10746. It also includes specific national requirements not included in BS EN 14339 and BS EN 10746. This British Standard applies to underground fire hydrants: a) to be installed in a water supply system; b) size DN80; c) suitable for a