The type B designation is assigned to gas venting systems that meet the safety requirements of Underwriters Laboratories, Inc. The AmeriVent all-metal, double-wall gas vent is listed as type B by UL and is approved for residential and commercial applications such as Category 1 water heaters, boilers, furnaces, space heaters, or wall heaters. UL-approved type B gas vent products form a continuous passageway from an approved gas appliance to the termination of the vent above the roof of the structure.

AmeriVent® Storm Collar, Series: ESC, 3 in, 0.018 in Galvanized Steel, Galvanized, 1-7/16 in H x 3-1/2 in ID x 6-5/8 in OD

• AmeriVent pipe are lightweight and rugged feature, made of corrosion-resistant galvanized steel and aluminum
• Ends have a snap-lock coupling
• 1 in minimum clearance to combustibles
• To disengage the locking tab - align the seams and pull apart
• Locking tab - to ensure a secure fit, push in the locking tab to lock the pipes together
• Engagement - snap-lock joints overlap - to calculate height deduct 1 in for each joint
• Used just above the flashing to provide protection from the weather
• Seal the inner edge with sealant against pipe
• Use above flashing or top support plate, use mastic to seal to vent pipe

• Catalog https://assets.unilogcorp.com/267/ITEM/DOC/AmeriVent_3ECW_Catalog.pdf
• Full Engineering Drawing https://assets.unilogcorp.com/267/ITEM/DOC/AmeriVent_3ESC_Full_Engineering_Drawing.pdf
• Instruction/Installation Manual https://assets.unilogcorp.com/267/ITEM/DOC/AmeriVent_3ESC_Instruction_Installation_Manual.pdf