Siamese 1 : (1) A fitting used to combine two or more hose lines into one; the inlets are usually female and the outlet is usually male. See also: Wye. (2) The Act of Connecting A Siamese Line. See also: Siamese 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}