<snip> So, I'd imagine you could tie the hose something like you would flat/tubular webbing, right? What kinds of knots would be best to connect lengths of hose together or to a fixed strong point, then? <snip>
I've seen water knots (overhand follow through) used with webbing, and Flemish bends and loops (figure 8 follow through) used in technical climbing and rescue.
http://www.animatedknots.com/indexrescue...imatedknots.comMore then a while back, I went rock climbing with a climbing harness consisting of two overhand knot loops and several turns around my waist secured with a reef knot. While not particular comfortable, it was simple enough for a bunch of untrained teenagers to reliably tie. You can find it about half way down the page under "Improvised seat harness"
http://www.wilderness-survival.net/mountain-climbing/roped-climbing/