Master Flow 4 in. x 4 in. x 4 in. Wye-Y4X4X4 - The Home Depot
Message to Our Customers

Master Flow

Model # Y4X4X4

Internet # 100396979

Store SKU # 232940

4 in. x 4 in. x 4 in. Wye

Master Flow 4 in. x 4 in. x 4 in. Wye

This item has been discontinued.
The Home Depot no longer carries this specific product.

$10.87 / each


Model # Y4X4X4

Internet # 100396979

Store SKU # 232940

Store SO SKU # 755578

These Master Flow 4 in. x 4 in. x 4 in. Wyes are also known as reducing laterals. They're great for transitioning from 1 pipe to 2 in your heating and air-conditioning applications.

  • Galvanized-steel construction
  • Use in heating and air-conditioning applications as reducing laterals to transition from 1 to 2 pipes
  • Installs with sheet-metal screws
  • Insulate ductwork for system efficiency and comfort
  • Seal seams with code-approved mastic, sealant or duct tape (not included)

Info & Guides

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Assembled Depth (in.) 
4 in 
Assembled Height (in.) 
8.5 in 
Assembled Width (in.) 
11 in 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Brand/Model Compatibility 
HVAC application 
All HVAC types 
Product Weight (lb.) 
1.3 lb 
Warranty / Certifications
Manufacturer Warranty 
Free from Manufacturer Defect at Time of Delivery. 


Rated 4.8 out of 5 by 4 reviewers.
Rated 4.0 out of 5.0 by Not available in Stores I ordered this 4" duct wye because it was not available in stores. It is all that it is supposed to be. Note: this particular type is not for venting furnace or gas water heaters. February 19, 2015
Rated 5.0 out of 5.0 by Fantastic This high-quality aluminum piece is ideal for easy airflow by avoiding a 90-degree angle while tying in two air ducts. This specialty piece seemed impossible to find anywhere - so glad Home Depot had it online! February 12, 2015
Rated 5.0 out of 5.0 by Worked out great These fittings are being used in my dust collection system in my woodshop. They were delivered without damage and in good time. The seams are easily sealed with a premium silicone duct caulking to prevent leaks that is the downfall of any dust collection system. December 11, 2012
Rated 5.0 out of 5.0 by This Product Works like a dream Was glad I checked at Home Depot. They had what I was looking for and if it was not in stock they would order it for me. I love shopping at Home Depot November 15, 2011
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