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Discussion Starter #1
Im trying to install my microwave. Homedepot only has 7in vents like this

http://www.homedepot.com/p/Master-Flow-7-in-Roof-Jack-with-Wagon-Cap-RJWC7/202191804

They also have a 7in like this:

http://www.homedepot.com/p/Master-Flow-7-in-Goose-Neck-Vent-Roof-Cap-in-Black-GNV7BL/202191777

They however do not have a 6in one at all. They have a 4in is the next size down. The instructions recommend using a 6in though. Is it ok to use a 6in pipe in a 7in vent? Homedepot doesnt sell a 10inx7in or a 6inx7in adapters!
 
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