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Old 09-08-2019, 03:52 PM
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Al Schober Al Schober is offline
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Just to muddy the waters...
Most of the scavenge tubes I've seen use flare fittings. The nut is slipped onto the tube and then the end of the tube is enlarged with a special tool to make a small cone. This female cone fits over a male cone on the fitting then the nut tightens it all up.
No reason a compression fitting can't be used, but that requires a compression ring (I wouldn't use plastic), a different nut, and a different fitting.
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