Hose, Delivery : Hose used on the delivery side of a pump, the standard sizes are 45, 64, 70, 90, 100 and 150 mm (1 3/4, 2 1/4, 3 1/2, 4 and 6 ins) int. diam
H. J. Porter (Chairman - Technical Committee), Dictionary of Fire Technology, The Institution of Fire Engineers, The Victory Press (Leicester) Ltd. 1979 UK. (Fr Tech - Brit) {81}