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: 0SC, 4 in
- 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
- The storm collar serves as a counter flashing and requires mastic to seal to the vent pipe
- Used to provide a weather-proof seal to an oval pipe above a roof line
- Installed above the oval flashing
- Seal inner edge with sealant