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90 Degree Long-Turn Ell 4"
Part Number LT90
90 Degree Long-Turn Ell 4"
500% more efficient than the standard ell.
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90 Degree Long Turn Dryer Elbow - Overcomes Length of Run Issues and Increases Efficiency - 4"

The Dryer-Ell has a longer radius and smooth interior that reduces friction. It can be measured the same as straight pipe, eliminating the run-length reduction currently required for other elbows in most building codes.  We estimate it pays for itself in 2 years - energy wise.  UL studies show it is 500% more efficient than the standard 4" ell. 

Click Here to see if your favorite supply house already has them in stock (if not, you'll also find tips on how to get them to carry Dryer-Ells).
Consider our Bonus Kits that save you even more money when you buy them as a kit. 
Questions and Answers View all Q&A
Q: What is the radius of the bend of the 90 degree long-turn ell? Has anyone used this ell inside the dryer for a rear to side vent conversion? Inquiring minds want to know. Thanks.
Asked by:  - 7/20/2014 (Submit an answer)
A: the center line of the elbow is a 10 inch radius, and I have had the question before about if it would fit or not, and have not had a chance to check or heard that it would. please add to the thread if you learn it does.
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Q: Why is are the ends to large to fit regular 4" tubing?
Asked by:  - 8/4/2014 (Submit an answer)
A: In dryer exhaust ventilation, it is a requirement to keep the male-female ends of the pipe in such a way that the interior does not create a area for lint to build up on. Our long turn elbow exhibits these ends and actually was designed and mostly used in the attic or crawlspace in venting to the exterior.
Flex would fit over the male end of our elbow, but it was not originally designed to accommodate a flex connection.
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Q: Need a connector that is oval connect to dryer box top and 4 inch circle to connect to outside vent. Does this long turn EII 4" fit the bill?
Asked by:  - 11/16/2014 (Submit an answer)
A: Long turn ells are most used in the attic or crawlspace. There is no oval to round adaptor for the dryerbox but it usually takes about 10-12 inches of snaplock pipe to get back to round from oval. The long turn elbow is very rigid and does not deform at all. Hope this helps.
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Customer Reviews Average Rating review View All Reviews
Great !
These sweep elbows are great. Solved a tough problem for me. Easy to assemble & install. Not available in stores here but this vendor ships extremely fast - I had my order within 36 hours. Thanks for a job well done.
Reviewed by: Kurt from Maryville TN. on 5/25/2015
Solved a problem
This duct although expensive solves problems with installation and then keeping the ducts clean. Someone installed corrugated duct for a 25 foot run. Using the long turn elbow from this company and smooth interior pipe clogs should be a thing of the past.
Reviewed by: papadewey from Arizona. on 5/24/2015
Long Turn Ell 4"
First off, Dryerbox is a great company, with awesome customer service. I have a long run that required 4 standard elbows to make the 90 degree turns. But I could never get my vent brush past them and the flow was minimal. These long turn ells are the cat jammas. I couldn't be more happy. The vent blows nicely and there is no more lint build up that I had with the standard elbows. I highly recommend thes or any dryerbox products. Check out the videos on youtube for yourself. AAA+++
Reviewed by: Scott from MN. on 2/19/2015
great fix
Local building codes changes showed a flaw in our design on a location of the laundry in our project. These elbow reduced the run length enough to pass the inspection and keep the project on time.
Reviewed by: gary from Cleveland TN. on 2/2/2015
Fantastic Product!
Exactly what I was looking for. Excellent fit and finish.
Reviewed by: Dave from Texas. on 1/14/2015
Great product, but...
This is a great product that greatly reduces flow inefficiencies associated with a typical 90 degree bend. I like how the inside is perfectly smooth which does not disrupt air flow. A few things I think they could improve upon: Even when the product is assembled with screws, a small gap will remain at the joints. To counter this, I used many small pieces of foil tape to completely seal it, which is tedious. Perhaps they could include a gasket or pre-cut foil pieces that curve nicely along the bend. If they have a different method or best practices on how to close the gap, I would love to hear about it. I think the limited distribution of this product is really holding the company back. Not only is the price high, but it's also inconvenient to only purchase it through their online store. This is a great product and should be offered at every big box retailer. Hopefully once they start increasing their production volume, they can reduce their units costs.
Reviewed by: Ryan from Milwaukee, WI. on 11/12/2014
Excellent Product
I find the 90 Degree Long-Turn Ell 4" to be an excellent product that doesn't restrict the airflow on my electric dryer exhaust. Actually, I had already run the exhaust using a standard 90 degree Ell near the ceiling joists but disassembled it and instead used this one. However, I find it to be ascetically ugly in appearance. The functionality is great but it's a terrible thing to look at. The fins are quite ugly in appearance. I realize that a dryer exhaust pipe is nothing but a dryer exhaust pipe and that 99.999 percent of customers couldn't care less what it looks like but I take great pains to make everything ascetically pleasing to the eye. I demanded the same from a local HVAC company during a recent install of a new furnace and air conditioning unit. I'm wondering why this Ell isn't stamped at the factory as a single piece of metal with a snap together fitting similar to straight dryer exhaust pipe. Perhaps it's not possible. I don't know. I'm not an engineer. Perhaps it would unnecessarily increase the expense of the Ell which I can certainly understand. After all, business is cutthroat and competition is competition. Nevertheless, I highly recommend this Ell to anyone who doesn't want restricted air flow, especially if the exhaust run is a long one. I didn't worry about sealing the outside fins on this Ell as I used high temperature silicone caulk on the inside seams, thus sealing it completely. I used foil duct tape on all the connections of the exhaust as I didn't want any screws protruding into the pipe. I wish the major big box hardware stores and smaller hardware stores would stock this item. Again, I highly recommend this item to everyone. It's a quality piece.
Reviewed by: Charles from Canton, Ohio. on 9/28/2014
90 Degree Long-Turn Ell 4"
We always order these Long-Turn Ells from The Dryerbox website. No one in our town keeps them in stock. Turn around time between ordering and receiving the parts is very reasonable. We are definitely a returning customer. I'd recommend them to anyone.
Reviewed by: Southern Comfort HVAC from Huntsville, AL. on 9/19/2014
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