# 4: I Have a Round Drop-down Trapdoor Style Damper. How do I Plug the Round Flue Pipe?

Open Flue Pipe above a Round Side Hinged Damper

4-1: Open Flue Pipe above a Round Side-Hinged Damper

Closed Round Trap-door Damper in a Majestic Brand Fireplace

4-2: Closed Round Trap-door Side-Hinged Damper

9x9 Chimney Balloon installed in a Majestic Pre-Fab Fireplace

4-3: 9×9 Chimney Balloon installed in a Majestic Fireplace