Discharge Device 3 : A device designed to discharge water or foam-water solution or water additive solution in a predetermined, fixed, or adjustable pattern
NFPA 18A Standard on Water Additives for Fire Control and Vapor Mitigation, 2007 ed. file:///C:/Users/user/Downloads/RFEvaluationWaterA dditives%20(1).pdf, (Fr Cont&Vpr-Mitg Wtr-Add - Amer) {187 NFC}