The Majestic DuraPlus 8" Galvanized Steel Wall Thimble is a premium triple-wall chimney system component designed to provide a safe, code-compliant pass-through for wood stove, fireplace, and all-fuel chimney installations. Featuring advanced ceramic blanket insulation combined with an insulating air space, the DuraPlus system keeps the outer wall cooler while maintaining a strong, efficient draft. This galvanized steel wall thimble minimizes heat transfer, eliminates hot spots, and enhances chimney fire safety, protecting both the chimney system and surrounding combustible wall materials.

Engineered for continuous operation at flue gas temperatures up to 1000°F, the Majestic DuraPlus Wall Thimble meets rigorous UL 103HT safety standards, including one hour at 1400°F and three 2100°F chimney fire tests. Its durable construction delivers dependable performance, long-lasting protection, and reliable support for modern all-fuel chimney venting systems.

• Heavy-Duty 8" Wall Thimble: Designed specifically for Majestic DuraPlus 8" triple-wall chimney systems, providing a safe and code-compliant wall pass-through for wood stove, fireplace, and all-fuel chimney installations.
• Adjustable Wall Thickness: Telescoping design adjusts from 4 1/4" to 7 1/4" wall thickness, fitting between standard wall studs for flexible residential chimney venting system installations.
• Expandable for Thick Walls: Telescoping sections can be extended up to 16" with a field-fabricated extension, accommodating thicker wall assemblies without compromising safety.
• Professional Interior Finish: Includes a painted black interior trim ring that conceals rough openings and provides a clean, finished appearance.
• Safe Horizontal Chimney Installation: Designed for use with DuraPlus chimney pipe installed horizontally through the wall, extending at least 2 inches into the room beyond the interior wall for proper installation.
• Adapter Compatible: Compatible with DVL and DuraBlack adapters, allowing seamless integration with approved stove pipe systems.
• UL 103HT Certified: UL Listed to UL 103HT (MH7399), ensuring dependable high-temperature performance, fire safety, and code-compliant installation.

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