Use this to make a transition and convert your venting run from Z-Vent single wall vent pipe to double wall pipe. Can also be attached to a single wall flue outlet collar.
• Vent material: AL29-4C stainless steel
• Certification: Tested to meet or exceed Underwriters Laboratories (UL) spec UL1738 and ULS636
• Approval: Cat II, III, IV venting
• Limited Lifetime Warranty