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® Adjustable Elbow, EAL Model, 4 in Size, 90 deg, 5 x 5-1/2 in Center-to-End, 8-3/4 in H

• 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
• Adjusts from 0 - 90 deg easily in order to clear rafters or ceiling joists
• Constructed of four sections for smoother bends and less resistance

• Catalog https://assets.unilogcorp.com/267/ITEM/DOC/AmeriVent_7VPH_Catalog.pdf
• Instruction/Installation Manual https://assets.unilogcorp.com/267/ITEM/DOC/AmeriVent_8RAL_Manual.pdf