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Double interlock preaction system - full building coverage

Question asked by rerickson on Jan 9, 2020
Latest reply on Mar 27, 2020 by rerickson

Are there any occupancy restrictions where a double interlock preaction system may be used?  For example, could an entire hospital (Institutional) provide sprinkler coverage with a preaction system?  It appears that if they meet size limitations, follow sprinkler head listings, and meet water delivery times that it would be acceptable. 


However, this does create a situation where an impaired fire alarm system will also now prevent the sprinkler system from operating.