Metal-Fab 4M3 Double Wall Vent Pipe, 4 in x 3 ft voomi_id_20614 It has a shutter for

It has a shutter for protection and provides reliability in various environments

Features an automatic reset post-activation

Supports systems up to 4 tons

Durable PVC construction for long-lasting performance

Metal-Fab 4M3 Double Wall Vent Pipe, 4 in x 3 ft voomi_id_20614 It has a shutter forProduct Description The Metal Fab 4M3 is a double wall gas vent pipe designed for use with category I appliances. This venting solution meets NFPA standards and is ideal for installations involving gas boilers, fireplaces, and furnaces. Constructed with an aluminum alloy flue and a galvanized steel casing, it ensures durability and safety in operation. Size: Four inches in diameter and three feet in length Type: Double wall, round, Type B gas vent