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Old 12-15-2009, 10:27 AM   #1
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duct elbow


So I need to create a U shaped duct for a bypass on my furnance.. I have an elbow joint duct it ways 90 degrees but when I put two straight pieces on it, its no where near square... am I missing something here? why isn't 90 degrees square? is this the way they all are or is this just a bad elbow? I can rotate one part of it, but it doesnt seem to help much in making it more square... should another part rotate somewhere to make it more? what am I missing? thanks!

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Old 12-15-2009, 10:29 AM   #2
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duct elbow


need more input... size and type duct?
got any pics of what you're doing?
that almost always helps.

DM

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Old 12-15-2009, 10:35 AM   #3
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duct elbow


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Originally Posted by DangerMouse View Post
need more input... size and type duct?
got any pics of what you're doing?
that almost always helps.

DM
6" Diamater standard alum heat duct

I am running behind the furnance from the return to the supply which has a humidifier which needs to connect to the return via this bypass duct its a 6 inch duct connection on the humidifier and I have a 6 inch connector already on the return with a damper on it to close it off when needed... just need to make a connection between these two, which is a U like shape just with short straight ends to a 90 degree elbow then in the middle a 4 to 5 ft straight duct

something similar to this picture http://z.about.com/d/homerepair/1/0/...ier3_noted.jpg

but the elbow does not go 90 degrees.. it points away from by like 10-15 degrees where I need to be...

Last edited by BlueBSH; 12-15-2009 at 10:39 AM.
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Old 12-15-2009, 10:52 AM   #4
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duct elbow


if it's EXACTLY like that corner shown in that pic, those sections swivel within themselves to align properly.
is this the case?

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Old 12-15-2009, 10:56 AM   #5
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duct elbow


All 4 joints of the elbow should turn. Try a drop of oil on the joints and if that doesn't work take it back for a new one.
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Old 12-15-2009, 10:57 AM   #6
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duct elbow


Quote:
Originally Posted by DangerMouse View Post
if it's EXACTLY like that corner shown in that pic, those sections swivel within themselves to align properly.
is this the case?

DM
I can get one part of the elbow to swivel, but it will never move to a place that makes it a good 90 degree angle should only one part move? because thats all I can get to move is one end piece that has the ribbing on it

Last edited by BlueBSH; 12-15-2009 at 11:00 AM.
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Old 12-15-2009, 11:03 AM   #7
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duct elbow


Quote:
Originally Posted by Marty S. View Post
All 4 joints of the elbow should turn. Try a drop of oil on the joints and if that doesn't work take it back for a new one.
what he ^ said....
all the sections should swivel.

DM
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Old 12-15-2009, 11:06 AM   #8
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duct elbow


Quote:
Originally Posted by DangerMouse View Post
what he ^ said....
all the sections should swivel.

DM
I'll give it a try over lunch and see if I can get them to move with some oil drops or something... bugged the heck out of me last night when only one section would move...
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Old 12-15-2009, 04:52 PM   #9
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duct elbow


If the elbow is out of round (squished even slightly) the sections won't turn.

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