davidkvcs:

Our (Ashley Reid, KJ Stime and me) first fix: an oxygen concentrator with a broken aluminum tube. We initially tried to reinsert the non-broken part of the aluminum tube into the compressor outlet, however this caused a major leak.
We ended up connecting the two ends with rubber tubes. The entire composition was held together by plastic zip-ties.
The oxygen concentration is now once again ready for use – an easy but useful fix.