The nozzle had a 3/4" NPT opening on the top so I welded a 3/4" NPT plug to a 1/2" NPT tee fitting, then I bored the other ports of the tee to let a piece of 1/2" EMT slip through for the bell to pivot on. I welded a piece of 1/8" X 3/4" X 4" long flat iron on top of the tee for a lanyard. Fabricated a clapper (w/a small ring on the bottom "just in case"). Cobbled up a stand for it that can be mounted either horizontal or vertical. Bell is 5" diameter and 9" long.