DuraVent DuraTech 7DT-TC Square Trim Collar for Round Support Box – 7″ – 8″


Brand: Duravent

Original price was: $96.72.Current price is: $87.05.

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DuraVent DuraTech 7DT-TC Square Trim Collar for Round Support Box – 7″ – 8″

DuraTech 7DT-TCR Square Trim Collar conceals the gap between the Round Ceiling Support Box and the ceiling cutout. Painted black. For use with 7″ & 8″ DuraTech chimney.

Duratech is designed for appliances that are tested and listed for use with a 2100°F HT chimney system, such as wood stoves, fireplaces, furnaces, boilers, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas. Available in all stainless steel (5″-8″ SS) or with a galvalume (6″-8″ GA) outer casing and stainless steel inner wall with twist-lock connections.

DuraTech: The optimum in safety and performance for an all-fuel chimney.


  • Limited Lifetime Warranty
  • Wide variety of diameters available.
  • Twist-lock fittings. No locking bands or mechanical fasteners required
  • Available with stainless or galvalume outer walls.
  • 1” Refractory insulation encased between two walls keeps the outer wall cool, while ensuring high flue gas temperatures for optimum draft performance
  • Light weight Thermo Tech insulation makes pipe sections lighter
  • Has the smallest outside diameter available to allow easy placement between studs
  • Thickest inner wall construction in the industry providing the best protection from creosote fires.
  • 430 Stainless Steel Inner Wall
  • UL Listed

Also available:

8DT-06 6″ Chimney Pipe – GA

8DT-06SS 6″ Chimney Pipe – SS

8DT-09 9″ Chimney Pipe – GA

8DT-09SS 9″ Chimney Pipe – SS

8DT-12 12″ Chimney Pipe – GA

8DT-12SS 12″ Chimney Pipe – SS

8DT-18 18″ Chimney Pipe – GA

8DT-18SS 18″ Chimney Pipe – SS

8DT-24 24″ Chimney Pipe – GA

8DT-24SS 24″ Chimney Pipe – SS

8DT-36 36″ Chimney Pipe – GA

8DT-36SS 36″ Chimney Pipe – SS

8DT-48 48″ Chimney Pipe – GA

8DT-48SS 48″ Chimney Pipe – SS

8DT-60CF 60″ Chimney Pipe – GA

8DT-60SSCF 60″ Chimney Pipe – SS

8DT-21TASS Adjustable Pipe 14″-21″

8DT-E15K 15° Elbow Kit – GA (includes 2 Elbows & 1 Elbow Strap)

8DT-E15KSS 15° Elbow Kit – SS (includes 2 Elbows & 1 Elbow Strap)

8DT-E30K 30° Elbow Kit – GA (includes 2 Elbows & 1 Elbow Strap)

6DT-AES 6″ & 8″ Adjustable Elbow Support

8DT-CS11 Square Ceiling Support Box – 11″

8DT-CS24 Square Ceiling Support Box – 24″

8DT-CS36 Square Ceiling Support Box – 36″

7DT-TCR Trim Collar for Round Support Box – 7″ – 8″ (Round)

8DT-FCS Flat Ceiling Support Box

8DT-RS Roof Support

6DT-ARS 6″ & 8″ Adjustable Roof Support

8DT-WT Wall Thimble

8DT-IWT Insulated Wall Thimble

8DT-WTSS Wall Thimble Exterior Trim – SS

8DT-TSB Adjustable Tee Support Bracket – GA

8DT-TSBSS Adjustable Tee Support Bracket – SS

6DT-RES 6″ & 8″ Adjustable Re-Support

6DT-AWS 6″ & 8″ Adjustable Wall Strap

6DT-AWS-SS 6″ & 8 Adjustable Wall Support – SS

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Weight1 lbs


Duratech Install manual




M&G DuraVent, Inc. (“DuraVent”) provides this limited lifetime warranty for all of its products with the exception of Ventinox® (lifetime), and PolyPro® (ten years). Subject to the limitations set forth below, DuraVent warrants that its products will be free from defects in material or manufacturing, if properly installed, maintained and used. DuraVent products are fully warranted if installed only by a professional installer. See owners manual for full warranty.

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