Wet Pipe Sprinkler System 2 : Sprinkler system containing pressurized water rather than air, such that water will flow immediately upon release of a heat-sensitive head
Wikipedia, The Free Encyclopedia, Glossary of firefighting equipment, Wikimedia Foundation, http://en.wikipedia.org/wiki/Glossary_of_firefight ing_equipment, CA, USA 2012. (Fr Srvc - Amer) {509}