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> * 24 gauge (.028) galv steel vent pipe 12" dia x 18" l
* 24 gauge (.028) galv steel vent pipe 12" dia x 18" l
^ Subtract 1-1/2" for length when inserted into mating duct.
* Heavy gauge, stronger material. More commonly found in structurally thinner 28 or 26 gauge.
** Made of Galvanized steel with a G90 rating. G90 is a grade of galvanized coating produced to ASTM A653 specifications. It has .90 oz/sq ft. of zinc overall, .45 oz/sq ft. per side for excellent corrosion resistance and longer service life.
Most HVAC is made with the lesser G60 coated metal.
