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I have install them on my last two trucks with only one problem, 2 years after the last set was install. One hose conection let loose and I lost the air. All I had to do was re-cut the line and reinstall it. 3 years later it has no leaks.
You might just have a bad press-in fitting, or need to recut the hose on one fitting and re-seat it.
Good luck
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