Round Base Chimney Vacuum Cap – Galvanized

(13 customer reviews)


Category: Chimney Cap – Subcategory: Round Base Material: Galvanized Steel – Finish: Mill – Thickness: 28 Gauge Shape: Round – Dimensions: 3″, 4″, 5”, 6″, 7″, 8″, 9″, 10″, 12″, 14”, 16″, 18″ – Sku: GVC


The FAMCO GVC 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 its flat side facing the winds. Quality constructed in 28 – 24 gauge Galvanized steel. The FAMCO GVC Chimney Cap has a round base for installation over a round pipe and comes in a range of diameters from 3 inch to 16 inch with heights ranging from 4¼ inch to 15 inch respectively. The FAMCO GVC 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 by phone or email.

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Round Base Chimney Vacuum Cap - Galvanized


13 reviews for Round Base Chimney Vacuum Cap – Galvanized

  1. Jon W. (verified owner)

    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.

  2. Rod W. (verified owner)

    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!

  3. Nicholas G. (verified owner)

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

  4. Steve Ahler (verified owner)

    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!!

  5. Mike Lidikay (verified owner)

    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.

  6. Chester Adkins (verified owner)

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

  7. robert aubel (verified owner)

    great service

  8. robert aubel (verified owner)

  9. Anthony S. (verified owner)

    Works fantastic… Glad we chose this product

  10. Jerry Hall (verified owner)

  11. Darrel Jones (verified owner)

  12. Sam (verified owner)

  13. Gregory Wiggs (verified owner)

    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.

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