Chemical Line 2 : A 3/4 in. or 1 in. rubber-covered hose; formerly it was used with a large sodaacid chemical tank that was carried on fire apparatus. See also: Red Line
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}