Required when penetrating combustible materials. Refer to our installation instructions for specific requirements.

DIRECT-TEMP Firestop Features: Siliconozed fiberglass seal 304 Stainless Steel welded seam inner flue LockTab security Pipe rotates easily to align system components No sealant required High efficiency performance Clearance Specifications: Refer to appliance manufacturer's installation instructions for proper clearance to combustibles. Connection Specifications: Joint/Connection Overlap: 1-5/8" Joint/Connection Type: Twist-Lock standard on all diameters Material Specifications: Outer Wall: Heavy duty galvanized steel Inner Wall: 304 Stainless Steel Miscellaneous: Supported Fuels: Gas Only Warranty: The Smart Choice Lifetime Warranty