Model # DC3

Internet #100197348

Store SKU #259913

Store SO SKU #1000684603

null 3 in. Round Duct Cap
0050206937105

3 in. Round Duct Cap

$3.41 /each

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Product Overview

Master Flow Duct Caps are used to terminate round pipe runs in HVAC systems. Constructed of sturdy galvanized steel. Duct caps install using sheet metal screws. Always seal seams with code approved mastic or sealant. Insulate ductwork for optimal system efficiency.

  • 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
  • Insulate ductwork for optimal system efficiency

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1 Question2 Answers

Customer Questions & Answers

3 in. Round Duct Cap
3 in. Round Duct Cap

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Actual opening dimension?

This question is from 3 in. Round Duct Cap
Asked by
Sacramento, CA
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September 1, 2015
What is the actual inside opening dimension of the 3 in. duct cap? I need to cap an actual 3 in. pipe.
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Answers (2)

Asked by
Wilkes-Barre,PA
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December 8, 2015
Answer: 
3" inside diameter
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September 2, 2015
Answer: 
Thank you for contacting MasterFlow ... The inside dimension of the duct cap is 3". Please call Technical Services at 800-211-9612 with any additional questions.
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Customer Reviews

Rated 4.2 out of 5 by 6 reviewers.
Rated 5.0 out of 5.0 by Good quality I used this 3 inch duct cap attached to a 3 inch semi rigid flex hose for a generator exhaust I made. I cut a 1 inch hole in the cap and inserted industrial grade magnets in the cap to keep the cap tight to the muffler. It worked great. April 22, 2014
Rated 5.0 out of 5.0 by 3 inch round duct cap Dimensions were correct, galvanizing was evenly applied, item was strongly constructed. Good for projects requiring closure of a 3 inch pipe, tube, or duct. March 15, 2016
Rated 5.0 out of 5.0 by As Advertised Just what I needed for my project. Dimensions were critical and as specified. December 8, 2015
Rated 5.0 out of 5.0 by Just what I needed I used the 3" cap in an exhaust system on a portable generator. I needed something to convert from a 1" muffler to a 3" outlet in my weather proof enclosure. I drilled a 1" hole in the cap and secured it with a clamp and used a 3" x 4" reducer to get to my 4" exhaust outlet. The cap was just the thing that I needed. December 17, 2014
Rated 4.0 out of 5.0 by Deeper than pictured Item is constructed of sturdy galvanized steel and is almost 2" deep. It did work perfectly for my generator exhaust kit to help attach to the muffler. August 26, 2014
Rated 1.0 out of 5.0 by very poorly built and poor welding This product was poorly constructed as the welding work was rather unprofessional. It appeared to be slightly larger than the specifications. October 22, 2013
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