[BladeRunner]

I suppose it depends on how you view it, but to me the majority of the above descriptions indicate user error of some type or form. Leaks from tube to barb joins are user error in my opinion, because if they are done right they will not leak. A non user error would be if the tube actually split, but I'd consider this user error also if it were either the wrong type, bad fitting or cheap tube. For instance if I got a leak at one of the festo fittings because I didn't push it all the way in and pull it out to grip as designed, then that would be my user error, not a simple drip leak fault as such.

Again the drip type leaks are avoided using quality tube that is smaller than the barb, (but keeping the ID the same throughout). There are product faults like real pump & block failures, but these are rare and can be partially linked to user error for choosing cheap products, or ones that are maybe not the best suited.

Its hard to categorise every happing, but maybe to be of real world use your poll should distinguish between real pump failure and the usual user error induced "not turning it on". My guess is the majority of that vote % on pump failure is actually user error, but that wouldn't be obvious to someone just looking at the poll.