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Old 09-01-2020, 11:44 PM   #16
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Re: Code for dryer vent?


The flexible duct can only be used as a transition from the dryer to the permanent exhaust duct and cannot be longer than 8'. The remainder must be rigid metal duct. Taped joints are not required, just one of the acceptable methods of joining ducts.

One end of round sheetmetal is pre-crimped, you should not need to buy the crimper. It also comes in 5' lengths. I would use 'U' brackets attached to the concrete wall and keep it rigid all the way to the dryer.
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Old 09-03-2020, 03:17 PM   #17
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Re: Code for dryer vent?


Can clamps be used to join sections instead of tape?
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Old 09-03-2020, 03:47 PM   #18
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Re: Code for dryer vent?


Quote:
Originally Posted by Ultrarunner2017 View Post
Can clamps be used to join sections instead of tape?
Clamps work fine for flex duct, but aren't very effective for the 'hard pipe'. I recommend just buying the aluminum tape. I you're anything like me, you'll find plenty of uses for the rest of the roll, once you see how well it works. You may never use duct tape again.
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Old 09-03-2020, 08:11 PM   #19
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Re: Code for dryer vent?


Quote:
Originally Posted by HotRodx10 View Post
Clamps work fine for flex duct, but aren't very effective for the 'hard pipe'. I recommend just buying the aluminum tape. I you're anything like me, you'll find plenty of uses for the rest of the roll, once you see how well it works. You may never use duct tape again.
I purchased the Nashua Premium foil tape which meets UL 181A-P & B-FX. It was expensive, but is a rather large roll, 2.5in wide.
I want to hold off using the tape until I have finalized the install, as I don't want to be wasting tape. I temporarily placed clamps on the hard pipe at the joints. It seems to be holding, but I will use the tape once I have the permanent install done. I plan to replace all of the flex-pipe with hard pipe.
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