Proportioner 3 : A device placed between the discharge gate of a pumper and a hose line; as water flows through it to the hose, it mixes a foam concentrate or wetting agent into the water. See: Eductor
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}