Rain & Flue Caps


BEST-Flex Rain Cap
Manufactured with 304 Stainless Steel:
NOTE: This cap attaches directly to a BEST-Flex or BEST-Rigid Liner. Use with our STORM COLLAR, BEST SUPPORT CLAMP, and TOP PLATE.




HY-C Single Flue Cap
Manufactured with 18ga 304 Stainless Steel:
NOTE: This cap attaches to the outside of a clay flue tile or mounts on to the top of a masonry chimney with the use of cap mounting brackets. All our Single Flue caps have a 3/4" mesh to keep sparks to a minimum and critters out! Made of stainless steel, they won't ever rust and comes with a lifetime warranty.




BEST-Flex Multi Flue Cap
Manufactured with 18ga 304 Stainless Steel:
NOTE: This cap mounts to the top of the chimney crown or brick and covers two or more flue openings. All our Multi-Flue caps have a 3/4" mesh to keep sparks to a minimum and critters out! Made of stainless steel, they won't ever rust and comes with a lifetime warranty.

Assembling your "BEST" Top Mount Multi-Flue cap is this easy!

1 - You will notice these caps have top bolts on the top and screen ends that attach to the screen box.
2 - The 4 bolts and serrated flange locknuts (nut/washer combo) hold the sides together and the lid in place.
3 - All Caps come with 3/4" mesh to keep sparks in and critters out.
4a - Attach Multi-Flue to the top of chimney crown / brick with Chimney Top Adhesive and Tapcons.
4b - Attach Single-Flue to the top of chimney crown / brick with Cap Mounting Brackets and Tapcons.




Single Flue Cap Mounting Brackets
NOTE: If your flue tile doesn't stick up above the crown of your chimney simply mount the single flue cap to the crown with these four stainless steel brackets. Tapcons (not included) attach nicely through the pre-drilled holes.




Chimney Top Adhesive
NOTE: Use this clear silicone to adhere your top kit or top plate flashing to the crown. It seals cracks, prevents leaking, and corrosion to copper or galvanized chimney flashings! Use it to seal fireplace inserts and stoves too! (Heat resistant to 500 degrees).


Fuel Legend





Quick Help

  • How do I know which kind of Chimney Cap to choose?
    All chimney caps help keep rain & critters out and sparks in! But, depending on how your chimney terminates at the top or how many flues or openings there are in your chimney; is what will help you choose the correct one


  • What clearance is necessary for proper drafting on a Multi-Flue Cap?
    A 6" minimum clearance is necessary for proper drafting from the highest protrusion, such as the top of the flue tile, liner or chimney to the lid of the cap. Ex. If your flue tile sticks up 4" from the chimney crown, add 6" for clearance to that and you need a 10" ht cap.


  • How do I measure the chimney for a Multi-Flue Cap?
    Measure the outside perimeter of your chimney and subtract 3" from each side. This will tell you what screen size you need. Ex. Outside of brick measures 23"x35" and the flue tile sticks up 4". You will need a 17"x29" with a 10" height = MF172910.


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