Primer 4 : A device that enables a centrifugal pump to operate by evacuating the chamber and allowing it to be filled with water from a static source. See also: Exhaust Primer, Motor Primer, Rotary Gear Primer, Rotary Vane Primer
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}