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Needless to say, all my hose clamps have been replaced with what I hope are better ones...
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What are you using? My experience is that there are three ways of doing a hose clamp that I trust...
1. Stainless worm clamps - big, a bit clumsy, but will hold better than anything else. About the only failure modes are either not tightening them enough to hold, or over tightening them to the point where they cut the hose.
This works well on either barbs or smooth pipe ends.
The following I would use ONLY on fittings with barbs or at least a bulge on the end of the fitting to catch the hose on. IMHO they aren't as foolproof as the worm clamps, but they are a bit neater.
2. Stainless steel safety wire - put 2-3 wraps around the hose, pull tight, and twist the ends together (works best with safety-wire pliers!) This looks neat, and is actually FAA approved for use on aircraft hose applications, which says how good it is...
3. A heavy duty nylon zip tie pulled really tight.
I don't trust those nylon 'pinch together' type clamps at all.
Gooserider