Model # R4X3

Internet #100149942

Store SKU #148814

Store SO SKU #1000684915

null 4 in. To 3 in. Round Reducer
0050206925508

4 in. To 3 in. Round Reducer

$5.85 /each

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Product Overview

Master Flow Round Reducers are used to decrease the diameter of the pipe when making connections in an HVAC system. Hemmed collar edges make these Reducers especially strong and snug-fitting. They can also be used to increase pipe diameter if necessary.

  • Hemmed collar edges improve fit and increase strength
  • Also used to increase pipe size
  • 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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Customer Questions & Answers

3 Questions2 Answers

Customer Questions & Answers

4 in. To 3 in. Round Reducer
4 in. To 3 in. Round Reducer

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Are the collars on the 3 inch & 4 inch ends designed for inside diameter or ourside diameter?

This question is from 4 in. To 3 in. Round Reducer
Asked by
SF Bay Area
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August 21, 2016
I ask this question because I purchased a bathroom exhaust fan with a 4 inch diameter discharge. Home Depot conveniently had a plastic 3 to 4 plastic adapter right next to the ceiling fans. I liked that is was a short length. I only had to cut 1-1/2 inch of the rigid 3" exhaust line. It dry fit snug to the outside of the 3-inch exhaust. The problem was the 4-inch end of the adapter is exactly the same diameter as the 4-inch exhaust cowling coming off the fan. For a DIY market, that is not helpful. I used a No Hub Coupling to make the connection work.
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September 3, 2016
Answer: 
The four inch sits outside the exhaust flue. The three inch inserts into duct. This reduces Co2 chance of escape. Thus it is a four to three exhaust.
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This question is from 4 in. To 3 in. Round Reducer
 
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Can this be used on a 4" metal corrugated tubing coming from a dryer going into the 3" wall connection?

This question is from 4 in. To 3 in. Round Reducer
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January 3, 2016
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September 3, 2016
Answer: 
Yes, however ideally stay 4" all the way out for less restriction. There is a 4" kit for dryer venting.
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This question is from 4 in. To 3 in. Round Reducer
 
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Can this be reversed and used as a converter from a 3 inch exhaust to a 4 inch exhaust tip

This question is from 4 in. To 3 in. Round Reducer
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October 1, 2016
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  • 2016-10-30 T23:37:02.185-05:00
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Customer Reviews

4 in. To 3 in. Round Reducer is rated 4.7 out of 5 by 23.
Rated 5 out of 5 by from worked perfectly needed to increase 3 inch bathroom fan duct to 4 inch soffit vent and this worked perfectly.
Date published: 2016-09-20
Rated 5 out of 5 by from Perfect Fit This thING works great when upgrading your bathroom's air extractor. It's plug and play
Date published: 2016-12-06
Rated 5 out of 5 by from Met expectations connecting 3 in. ceiling fan to 4 in. duct to roof jack. Met expectations connecting 3 in. ceiling fan to 4 in. duct to roof jack.
Date published: 2016-12-06
Rated 5 out of 5 by from Extractor Fan This part let me install a bigger fan while using existing exhaust pipes.
Date published: 2016-11-23
Rated 5 out of 5 by from It was a wonderful piece of sheetmetal craftsmanship. It was a wonderful piece of sheetmetal craftsmanship.
Date published: 2016-12-18
Rated 5 out of 5 by from It is ductwork...what else can UI say? It is ductwork...what else can UI say?
Date published: 2017-01-10
Rated 4 out of 5 by from A bit expensive but worked just fine A bit expensive but worked just fine
Date published: 2016-11-08
Rated 5 out of 5 by from It worked the way it's supposed to. It worked the way it's supposed to.
Date published: 2016-12-06
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