Side view of FAMCO Round Base Chimney Vacuum Cap in galvanized steel.

Round Base Chimney Vacuum Cap - Galvanized-1258

infographic showing how to install the FAMCO Cone Top Chimney Cap - Galvanized Steel

Inside view of FAMCO Round Base Chimney Vacuum Cap. in galvanized steel.

Round Base Chimney Vacuum Cap – Galvanized

Rated 4.78 out of 5 based on 23 customer ratings

(23 customer reviews)

$34.95 – $199.95

Quality constructed from heavy-duty galvanized steel, 28-24 gauge depending on size (see more details below)
Increases updraft and prevents downdrafts caused from wind by forcing the wind to alter its direction over one of four gores on the cap, creating a partial vacuum
Designed to be mounted over single wall pipe and comes with a draw bolt collar for a secure fit
Positioning of the cap relative to the prevailing winds is not critical, but is slightly more effective when placed with the flat side facing the winds.
Available for single wall pipe sizes ranging from 3 inch to 12 inch outside diameter (not designed for double/triple wall pipe sizes)

Size

3 inch
4 inch
5 inch
6 inch
7 inch
8 inch
9 Inch
10 inch
12 Inch
14 Inch
16 Inch
18 Inch

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SKU VCG Categories Chimney Caps | FAMCO, Fireplace Chimney Caps, Round Base Chimney Caps

Description

The FAMCO VCG round base vacuum chimney cap has been used for decades with gas, oil, coal, and wood burning chimneys. This chimney cap increases updraft and prevents downdrafts caused from wind. This works by forcing the wind to alter its direction over one of four gores on the cap. The change of direction creates an area of lower density air (partial vacuum) at the outlet of the pipe. Lower density air creates draft within the exhaust pipe, helping to remove exhaust gases and increasing overall efficiency. The positioning of the cap relative to the prevailing winds is not critical but is slightly more effective when placed with the flat side facing the winds. Quality constructed in heavy-duty galvanized steel, 3 inch – 5 inch are made with 28 gauge, 6 inch – 9 inch are 26 gauge, and 10 inch – 16 inch are 24 gauge. The FAMCO VCG chimney cap has a round base and draw bolt for secure installation. The adjustable collar will only provide approximately ⅛ inch of play for tightening to the appropriate pipe size, and is not designed to expand to accommodate different pipe sizes or double/triple wall pipe sizes (NOT designed to fit X&⅛”, X&¼”, X&½”, etc.).Comes for pipe sizes ranging from 3 inch to 12 inch OD and heights ranging from 4¾ inch to 15 inch, see our specs sheet for more details. The FAMCO VCG chimney cap is manufactured by FAMCO in the United States and comes with a 1-year warranty against product defects and workmanship. If you have any questions about this product, please refer to the FAQs above or feel free to contact us.

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Download the VCG product PDF.

Spec Sheet

Round Base Chimney Vacuum Cap - Galvanized

SKU: VCG

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Questions and answers of the customers

Hi i live in CA and need a spark screen. Do you guys have a way to install on this cap? Thanks

Q Hi i live in CA and need a spark screen. Do you guys have a way to install on this cap? Thanks answer now
Asked on October 9, 2021 7:32 am

A
Hello,

We actually do not work with or supply any caps with Spark Arrestors / Spark Screens in them. Nor do we have just a standardized screen that we use in any of our Vacuum Cap models, so unfortunately we would not be able to offer recommendations on how to install a Spark Arrestor / Spark Screen on our caps at this time.

-Customer Support

So will this work on a triple wall chimney pipe if i buy and use the adapter you sell? it is triple wall pipe 6 inch. inch piping

Q So will this work on a triple wall chimney pipe if i buy and use the adapter you sell? it is trip...... Read more answer now
Asked on February 4, 2021 4:58 pm

A
For a multi-wall pipe (either double or triple walled), as long as you are using a chimney cap adapter (SKU# WCASS), any of our round based chimney caps can fit the corresponding adapter size. You'll need to select the adapter size that would work with the inside diameter of your innermost pipe size. The skirting on the adapter would then cover the other pipe walls, and then you can select a chimney cap size that matches the adapter size.

Hi - can this be painted? Recommended paint to use? Thanks!

Q Hi - can this be painted? Recommended paint to use? Thanks! answer now
Asked on October 22, 2020 6:20 am

A
Yes, this vent can be painted - we recommend using Rust-Oleum paint.

23 reviews for Round Base Chimney Vacuum Cap – Galvanized

4.8

Based on 23 reviews

5 star	82	82%
4 star	13	13%
3 star	4	4%
2 star		0%
1 star		0%

Rated 5 out of 5

Jon W. (verified owner) – March 22, 2019

This chimney cap is a solid gauge that should last a long time, and the adjustable closure is helpful for fit. The large sizes I needed was a custom order, but still I received them within a week, in perfect condition and the shipping cost was reasonable.
Rated 5 out of 5

Rod W. (verified owner) – September 8, 2019

Chimney caps are obscenely priced for a lightweight piece of metal you can crumple up in your hands. So I was delighted to find the Famco caps that were MUCH more reasonably priced. They arrived when promised, and have a very strong feel to them. Heavier gauge metal and well made. I’ll install on my cabin next weekend, then await the cold days so I can build a fire and see how well they draw. But so far, I’m very impressed. If they draw well, I’ll be placing a second order when I put a wood burner in my garage. Thanks!
Rated 5 out of 5

Nicholas G. (verified owner) – November 8, 2019

Excellent drafting even in windy conditions. Caps came quicker than expected, and install was very easy with the screws provided.
Rated 5 out of 5

Steve Ahler (verified owner) – November 30, 2019

We have fought smoke from downdraft for over 3 years at our new home. I have added extensions, had chimney cleaned etc etc to no avail. This chimney cap is wonderful!!
Rated 3 out of 5

Mike Lidikay (verified owner) – December 8, 2019

It works better than the one I had but the rain still get in the vent and goes down the inside of wall of the pipe to the stove.
Rated 5 out of 5

Chester Adkins (verified owner) – December 20, 2019

This item really helped me. I couldn’t find the item in the area where I live. Thank you so much.
Rated 5 out of 5

robert aubel (verified owner) – December 20, 2019

great service
Rated 5 out of 5

robert aubel (verified owner) – December 31, 2019
Rated 5 out of 5

Anthony S. (verified owner) – January 19, 2020

Works fantastic… Glad we chose this product
Rated 5 out of 5

Jerry Hall (verified owner) – February 1, 2020
Rated 5 out of 5

Darrel Jones (verified owner) – March 8, 2020
Rated 4 out of 5

Sam (verified owner) – May 5, 2020
Rated 5 out of 5

Gregory Wiggs (verified owner) – June 2, 2020

This is my second cap purchase of this style. The first one has lasted 4 years, galvanized I plan on replacing it this year. I really like the performance my woodstove has with it, the windier the better, I could probably get another year or two out of the old one but I am prepared now. Great cap design.
Rated 5 out of 5

Thomas (verified owner) – October 12, 2020

Great Service
Rated 5 out of 5

John P. (verified owner) – November 3, 2020

Looks great, exactly as advertised!
Rated 5 out of 5

Thomas (verified owner) – November 10, 2020
Rated 5 out of 5

John Wilson (verified owner) – November 12, 2020

Great
Rated 4 out of 5

Anonymous (verified owner) – November 13, 2020
Rated 5 out of 5

Shannon (verified owner) – November 24, 2020

It fits perfectly on our outdoor fireplace, thank you so much! Well made, affordable, great service
Rated 5 out of 5

Anonymous (verified owner) – November 24, 2020
Rated 5 out of 5

Anonymous (verified owner) – March 29, 2021

Fit perfect
Rated 4 out of 5

Eddy Garman (verified owner) – March 30, 2024
Rated 5 out of 5

Erich Britton (verified owner) – May 12, 2024