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AmeriVent® 4OSC
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, 4 in, Steel, Finish: Galvanized, Additional Information: Oval Shape, For Use With: Type B Gas Venting Systems
| Finish | : | Galvanized |
| Material | : | Steel |
| Size | : | 4 in |
| Additional Information | : | Oval Shape, For Use With: Type B Gas Venting Systems |
- 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
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