Guide that supports and aligns the wiper rod in Trojan UVLogic AS and AL ultraviolet reactors. It holds the threaded rod true along its length so the wiper carriage travels squarely across the quartz sleeves; a worn guide lets the rod deflect, which shows up as a wiper that drags on one side or stalls part-way through its stroke. Trojan part 794315. Contact us if you are unsure whether this part fits your UV system.