Model # DC4

Internet # 100396932

Store SKU # 365943

Store SO SKU # 755578

4 in. Round Duct Cap

$4.49 /each

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Product Overview

Master Flow Duct Caps are used to terminate round pipe runs in HVAC systems. An assortment of duct caps size are available to match the round pipe. Can be used for existing and new construction.

  • Sturdy galvanized steel construction
  • Always seal seams with code approved mastic or sealant (or duct tape)
  • Install with sheet metal screws
  • Always insulate ductwork for greater system efficiency and comfort
  • Universal duct cap for all HVAC types

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
4 in 


Brand/Model Compatibility 
HVAC application 
All HVAC types 
Product Weight (lb.) 
0.4 lb 

Warranty / Certifications

Manufacturer Warranty 
Free from Manufacturer Defect at Time of Delivery. 

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Customer Questions & Answers

1 Question1 Answer

Customer Questions & Answers

4 in. Round Duct Cap
4 in. Round Duct Cap

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This question is from 4 in. Round Duct Cap
1 answer

Is the 4 in OD or ID?

This question is from 4 in. Round Duct Cap
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January 23, 2016
Please state whether the 4 in size is ID or OD!
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Answer (1)

January 26, 2016
The 4" is ID. This item will fit over the 4" pipe. Please call MasterFlow Technical Services at 800-211-9612 with any additional questions or concerns for the use of this product.
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Customer Reviews

Rated 4.0 out of 5 by 1 reviewer.
Rated 4.0 out of 5.0 by Seems simple I dont understand why something like this is not in stock in a store. working as intended August 4, 2015
  • 2016-07-28 T14:48:41.547-05:00
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1-1 of 1
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