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6.3 b) System design

BS 8458 states:

'The watermist system should be a wet pipe system (i.e. one that is permanently charged with water).'

We have chosen to deviate from this requirement because by using a dry pipe you:

  1. limit the chance of water escape claims, and 
  2. increase the lifecycle of components as they are not continually subject to water and pressure. 

Automist was fire performance tested and shown to meet the requirements each time with a 19 seconds hose fill time using the longest allowed hose length of 60m. 

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