About 6 months ago, I was repairing a leak in my clothes washer. It was due to a loose bolt in the outer plastic shell. When putting it all back together, I didn’t realize it was important which way the drain tube routed around another piece. Apparently it mattered. The drainage tube ended up having a hole rubbed through it. My bad. Put some silicone over the hole, wrapped it up, routed it the correct way, resisted the urge to test it immediately, and let it cure overnight. Everything seems to be good so far through several loads. Worst case, if the silicone doesn’t hold, at least now I know it’s the drain tube and they’re fairly cheap.