DuraVent 3"-8" Inner Diameter DuraFlex Mortar Sleeve

The DuraVent 3"-8" Inner Diameter DuraFlex Mortar Sleeve is a high-quality chimney liner protection accessory designed to safeguard DuraFlex flexible stainless steel chimney liners when passing through masonry walls. Engineered for professional chimney relining installations, this mortar sleeve provides a protective barrier that helps prevent damage to the liner during installation while maintaining a secure and durable venting system.

Ideal for masonry chimney restoration, fireplace insert installations, and flexible liner applications, the DuraFlex Mortar Sleeve supports proper liner routing through wall penetrations. Compatible with 3-inch to 8-inch inner diameter DuraFlex liners, this DuraVent component helps ensure reliable chimney venting performance, safety, and long-term durability. It is an essential accessory for contractors and homeowners completing efficient, code-compliant chimney liner upgrades.

Features

• Protects DuraFlex Chimney Liner Through Masonry Walls: The DuraVent DuraFlex Mortar Sleeve is designed to protect flexible stainless steel chimney liners when passing through a masonry wall during chimney relining installations.
• Durable Chimney Liner Protection Accessory: Helps shield the DuraFlex SS liner from abrasion, pressure, and potential damage caused by direct contact with masonry materials.
• Designed for 3-Inch DuraFlex Liners: Features a 3-inch diameter design for compatibility with select DuraFlex flexible chimney liner systems and venting applications.
• 6-Inch Sleeve Length: Provides a 6-inch long protective passage to support safe and secure liner routing through wall penetrations.
• Improves Chimney Installation Reliability: Helps maintain the integrity of the chimney liner system, supporting proper draft performance, venting efficiency, and long-term durability.
• Ideal for Chimney Relining Projects: A professional-grade DuraVent chimney accessory for masonry chimney restoration, fireplace inserts, wood-burning appliances, and stainless steel liner installations.
• Supports Safe Flexible Liner Installation: Provides an added layer of protection for DuraFlex SS chimney liners, helping ensure a secure and code-compliant chimney venting solution

Specifications

Downloads

• Product Catalog
• Instruction Manual