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Old 02-22-2007, 05:19 PM   #1
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closing circular duct


Hello,

I just purchased several five foot sections of six inch circular duct at the local big box store -- it needs to be joined to make a tube. I'm not having any luck. Is there a tool to help "zip" it closed? Or is there a special technique?

thanks,
Steve6

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Old 02-22-2007, 06:32 PM   #2
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closing circular duct


Metal or flexible?

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Old 02-22-2007, 06:42 PM   #3
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closing circular duct


They are metal, shipped in semicircles to nest them to save space. I can see how the two sides come together and lock. I can start it at the end but can't get the seam to lock for more than the first two inches.
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Old 02-22-2007, 07:05 PM   #4
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closing circular duct


If you mean that you need to "lock" two seperate pieces together then you will need to use zip screws to hold them together because they do not stay together on their own. One end should have a "crimped" end and the other should be normal.
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Old 02-22-2007, 07:25 PM   #5
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closing circular duct


I'm just dealing with one five foot section. It is a piece of sheet metal five feet long by ~20 inches wide. The piece is curved so that it almost forms a closed tube five feet long. The two five foot sides of the piece are supposed to be locked together to close the tube. The five foot sides are a tongue and groove arrangement, but I can't get them to lock.

Once I can make tubes out of the sheets I can easily join them together as they do have a corrugated end.
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Old 02-22-2007, 07:30 PM   #6
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closing circular duct


The tongue slides inside the groove and it should lock when you get the unit together. Lay it down in a corner and then roll it together and push down when you have the tongue in the groove. You should hear it snap.
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Old 02-22-2007, 08:01 PM   #7
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closing circular duct


Your tip helped. I was trying to push on it in the midde of the room -- no corner. But I still had to use a screwdriver to widen the groove side of the sheet. Maybe the pieces I bought had the groove pinched a little too tight.

Thanks for your help!
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Old 02-22-2007, 08:06 PM   #8
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closing circular duct


You should be able to see a little tab that needs to be fully inserted into the groove for it to lock.



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