Specification for distress signal units for the fire and rescue service Ingestion-build-59651 The system is so designed

The system is so designed that the main valve re-closes and prevents a further flow of fluid after normal pressure conditions of service have been restored

thread and end configurations

- range of test levels

Endosulfan (sum of α-/β-isomers and Endosulfan-sulphate)

Specification for distress signal units for the fire and rescue service Ingestion-build-59651 The system is so designedBS 10999: 2010 Specification for distress signal units for the fire and rescue service BS 10999 is a British Standard which specifies minimum requirements for the performance and testing of distress signal units (DSUs) that emit at least an audible signal: a) To summon aid in the event the user becomes incapacitated or needs assistance, or for signalling evacuation, for use by Fire and Rescue Service (FRS) personnel, and b) That is activated