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Master Flow

Model # SB10X3.25X4

Internet # 100129949

Store SKU # 938999

10 in. x 3-1/4 in. to 4 in. Stack Boot

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

$8.58 /each


Model # SB10X3.25X4

Internet # 100129949

Store SKU # 938999

Store SO SKU # 755578

This Master Flow 10 in. x 3-1/4 in. to 4 in. Stack Boot can be used to create a transition between different pipes and ducts. It's made of galvanized steel and can be installed with sheet-metal screws.

  • Galvanized-steel construction
  • Creates an in-line transition between a round pipe or insulated-flexible duct to a rectangular stack or riser duct
  • 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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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
6 in 
Brand/Model Compatibility 
HVAC application 
All HVAC types 
Product Weight (lb.) 
1.09 lb 
Warranty / Certifications
Manufacturer Warranty 
Free from Manufacturer Defect at Time of Delivery. 


Rated 3.0 out of 5 by 5 reviewers.
Rated 5.0 out of 5.0 by works perfectly We had to really search for one that fit our space to adapt our hood/microwave through to the roof vent. Finally we found this one and hope it would work due to the low cost we were not sure. July 15, 2014
Rated 5.0 out of 5.0 by floor vent Would buy again is durable!! And worked for what we needed November 5, 2014
Rated 3.0 out of 5.0 by Did the job efficiently. A perfectly satisfactory part. ----------------------------------------------------------------------------------------- April 14, 2014
Rated 1.0 out of 5.0 by Damaged Product Product came out of the box extremely misshaped and unusable. It looked as though it had been run-over. I was very disappointed. February 6, 2014
Rated 1.0 out of 5.0 by very poor quality Bought this boot since I had to move the existing. This boot fell apart before I even got in the crawlspace. Rivets that connect the two pieces are terrible and the overall workmanship is atrocious. I managed to put it back together with sheet metal screws to make it work, but I will not buy any of these types of products from Home Depot again. November 23, 2013
  • 2015-08-03T12:35:20.684-05:00
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