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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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Description
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
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 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
90 degree long-term Ell - 4"
Great product. It should be distributed through Home Depot/Lowes. I had a 32' run so making two turns was critical. Most importantly the turns were slow and gradual. Awesome product!!!!!!
Reviewed by: Bill from Phoenix. on 9/4/2014
90 degree long turn
Arrived quickly - constructed of heavy gauge materials - assembly easy but did not give confidence that it would stay assembled. Installed self tapping screws in the flanges to ensure the pieces would remain assembled. Would buy it again to get the reduction in resistance required.
Reviewed by: John from Williamstown, NJ. on 7/13/2014
90 degree long turn ell 4"
works perfectly,arrived quickly.
Reviewed by: Mike from Georgia. on 6/8/2014
Quality Product
Recent purchase. HIGH QUALITY PRODUCT and EASY INSTALLATION
Reviewed by: Michael from Massachusetts. on 5/16/2014
90 degree long turn ELLs helped shorten drying time
My builder vented my dryer out the back of the house. The cheap aluminum foil hose was about 60 feet long. It was impossible to clean it out and I always feared a fire. So, I re-routed my vent system using 4" stainless steel pipe, two 90 degree long turn ELLs, and a Dryer Wall Vent - a total of 18 feet long. My drying time for heavy clothers was typically 60-70 minutes. Today it is 40-50 minutes with my new system which I attribute to less friction. There is also little or no lint build-up in the vent system because of the smooth interior.
Reviewed by: Bob from Maryland. on 3/2/2014
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