Tandem 1 : (1) A fire truck with two axles in the rear. (2) A method of boosting pressure in which two pumpers pump water from the same hydrant in series
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}