I experienced a lot of the failures over time and usually it's because of cheap stuff. For instance, my T-bolt clamps all started failing and I noticed I couldn't build much pressure. They all came lose/ stripped threads, etc... it seems with the cheaper ones it's a one use item, so if you tighten it, then take it off, that was it. If you put it back it never gets tight again. Also, if you have the right size T-bolt clamp the two humps in it should almost touch, yours on the hat looks real far apart like it's the wrong size, or the nut backed off a lot.