Dryer Vent duct - ok to use rigid pipe?


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Old 06-15-23, 09:29 AM
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Dryer Vent duct - ok to use rigid pipe?

I have a rental with a section of dryer vent duct that is exposed. As such the flexible accordion ducting can get damaged/crushed/etc if someone pushes things up against it.. The entire duct run spans approx 8 feet, going from my dryer to the exterior wall. It's sitting on the concrete lip of my garage which sits a few inches above the garage floor.. There are a couple of metal straps to help suspend the duct work.

There is about a 3 foot section that is exposed that can get damaged more easily. The rest of the duct is at the back of the dryer and behind a large freestanding storage closet. My thought was to use some of the more rigid 4" metal duct in this 3 foot section that is prone to damage.. Is this suitable for venting a dryer? I didn't want to introduce anything that would add risk of fire

thanks in advance!
 
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Old 06-15-23, 09:32 AM
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The entire vent should be run in rigid, galvanized steel. Only use flex for the tiny bit to connect to the dryer
 
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Old 06-15-23, 09:36 AM
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Thanks Pilot Dane!

Does this look like the right thing to use for this job - https://www.homedepot.com/p/Master-F...4X60/100196725 ? I can get some smaller flexible pieces to connect to the dryer and exterior wall
 
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Old 06-15-23, 11:39 AM
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That is what you'd use. Is it not a straight shot to the exterior vent? They also sell galvanized elbows. I'd only use the flex duct between the wall and the dryer.
 
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Old 06-15-23, 12:41 PM
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It's almost a straight shot to the exterior - veers out an inch or bit but it should work.. The distance is just shy of 6' .. So I'd have to extend that 5' length of pipe by about 10". I'll see what else I can find to make sure this whole length is galvanized and not flex ducting

thanks for the tips!
 
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Old 06-15-23, 04:57 PM
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Galvanized steel is the strongest and best choice. Not always the easiest to find.
Typically you'll find aluminum ducting which will also work.
You can buy a 5' piece and a 2' piece.
Cut to length before snapping together and then use foil tape to seal.
 
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Old 06-17-23, 09:15 AM
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QQ on best way to put together sections of the dryer venting. Do you guys recommend using the large 4" hose-clamps to hold sections together or fine to just use the foil tape? Or best to use both?

thanks again for the tips!
 
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Old 06-18-23, 03:09 AM
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I just taped mine.
 
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Old 06-30-23, 06:58 AM
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a couple of questions for the back of the dryer and the flex duct install:
1) How much 'slack' to leave for maintenance of pulling the dryer in/out?
2) Should i always tape the duct to the dryer or does the hose clamp suffice?
 
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Old 06-30-23, 09:17 AM
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Use as little metal flex as possible.
The vent doesn't get permanently fastened to the dryer.
I try to use a 90 on the end of the duct and set it up so that the dryer slides right into it.
 
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Old 06-30-23, 11:51 PM
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Gotcha - ok thanks PJMax - that is pretty much the way I set it up.. I'm using of those adjustable rigid pipes that can be made into a 90/45/etc.. and a hose-clamp to tighten it onto the back of the dryer.. I have a very small section of the flex pipe to connect the 90 from the dryer to the larger rigid section mentioned in the beginning of this thread.. Seems pretty solid and I don't detect any gaps for air/lint to get out.
 
 

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