Dry-pipe Sprinkler Systems 3 : A fire protection sprinkler system that has air instead of water under pressure in its piping; dry systems are often installed in areas subject to freezing
Tatyana Davletshina, Industrial Fire Safety Guidebook, Noyes Publications, New Jersey 07675, USA 1998. http://www.aura-o.aura-astronomy.org/aura/sites/de fault/files/files/Referencia_Bibliografica/industr ial%20fire%20protection%20handbook.pdf, (IndFrS - Amer) {470}