Model # B90E4

Internet #100033952

Store SKU #148717

Store SO SKU #1000683389

Master Flow 4 in. 90-Degree Round Adjustable Elbow

Master Flow

4 in. 90-Degree Round Adjustable Elbow

$3.98 /each

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Product Overview

Master Flow's adjustable elbows are used to make turns in runs of round pipe and flexible duct through 90°. They have a sturdy galvanized steel construction and are simple to adjust. They are also crimped on one end to easily fit into a pipe or other fitting of the same diameter.

  • Used to make angular or gradual turns in runs of pipe
  • Adjustable to any angle through 90°
  • 30-Gauge, galvanized steel construction
  • Always seal seams with building code approved sealant or duct tape
  • Always insulate ductwork for greater system efficiency and comfort

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Warranty / Certifications

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Customer Questions & Answers

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Customer Questions & Answers

4 in. 90-Degree Round Adjustable Elbow
4 in. 90-Degree Round Adjustable Elbow

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Joining 4 inch everbilt flex duct to 4 inch sheet metal duct?

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October 26, 2015
Can this be used to join a 4 inch everbilt flexible duct running from my dryer to the 4 inch sheet duct running to the outside of my house?
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Answer (1)

October 27, 2015
Thank you contacting MasterFlow ... Yes, Generally this elbow can be attached to both the flex duct and the metal pipe. Some additional manipulation of the pipe or elbow maybe needed. Please contact our Technical Services Group at 800-211-9612, M-F 8A-5P EDT for any additional help.
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Customer Reviews

Rated 3.4 out of 5 by 5 reviewers.
Rated 1.0 out of 5.0 by Pulls Apart Easily and It Leaks Air I recently purchased the Everbilt Dryer Duct Kit from Home Depot. that came with two of these kinds of elbows. It is a segmented device that you twist to get the angle the way you want. Those segments pull apart with just a little pull. Also, hot air leaks out between the segments reducing the airflow inside the venting tube reducing the power of the exhaust and also the distance you will be able to push the air and lent. The distance the hot air has to travel in my setup is about six feet vertically then out through the basement wall. You probably will have to apply tape around the leaks and the segments to keep it all together, but that might create a problem later on when you want to inspect the vent for lent build up. Lastly, my kit might have been tampered with at the store because one of the clamps to attach the elbows was new and the other was old and too small. A nuisance. September 3, 2016
Rated 5.0 out of 5.0 by Wish I bought this sooner The dryer vent opening in the wall of the home I bought had a shredded pipe. This was the perfect solution to get the accordion, adjustable pipe onto it. It also adjusts to a variety of degrees with the moving parts. Well worth 4 bucks. July 10, 2016
Rated 1.0 out of 5.0 by you get what you pay for I purchased three of these to rerun a dryer vent, I went from a side by side to a stack W/D. Years ago I worked in HVAC doing installs and replacements. This is by far the worst 90 degree fitting I have used. The first one pulled apart simply adjusting it from the 90 degree position. December 6, 2011
Rated 5.0 out of 5.0 by HVAC duct work materials I ordered numerous items including the 4" 90 degree HAV sheet metal elbows. They arrived professionally packed in just a few days and installed easily in my dust collection system in my shop. May 28, 2006
Rated 5.0 out of 5.0 by Very Adjustable Not much to say, but is very adjustable. Good for 90 deg, or 45 deg offsets. November 24, 2011
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