PATIKIL 1 Set 6-Inch Backdraft Damper with Ducting Hose Clamp Stainless Steel Flexible Airflow Insert Backflow Preventer Draft Blocker for Kitchen Bathrooms

This backdraft damper prevents lampblack, exhaust, debris, dust, and odors from entering your room when the ventilation fan is off, and is widely used in dryers, range hoods, and HVAC systems in homes, kitchens, bathrooms, and offices.

Made of durable stainless steel, it is waterproof, rust-proof, scratch-resistant, corrosion-resistant, moisture-proof, and easy to clean for long-term use.

When exhaust starts, air pressure opens the valve for discharge; after stopping, it automatically closes to keep air fresh, features a high‑temperature fuse that activates above 150°C, and includes a silicone sealing gasket for excellent sealing performance.

Installation is simple: fix the damper to the vent hole with spring clips, apply sealing glue around the base, and attach the vent hose with pipe clamps.

Please confirm the outer diameter before ordering.