A broken trekking pole is usually an inconvenience rather than a disaster. However, if you are using your trekking poles to support your shelter (e.g. a Trailstar or Duomid), then a broken pole becomes a critical problem.
Now, I’ve never broken a pole, but there’s always a first time. After a short conflab on Twitter, Nigel gave me the idea of making a pole splint from some polypropylene pipe. So, today I nipped down to Homebase and bought some 22mm overflow piping. I cut a 15cm section and voilà, an almost perfect trekking pole splint, weight 12g.
I always carry some duct tape, so both ends can be easily secured. It should be good enough as a temporary repair. When I was looking at pipes, I found that overflow pipes were lighter than ordinary polypropylene plumbing pipes and a lot cheaper. From now on, I shall be carrying one in my repair kit.