- Durable PVC Construction: Made from high-quality PVC material, this backdraft damper is designed for exceptional longevity and reliable performance, ensuring it withstands the test of time. - Prevents Backflow: The primary function of this damper is to effectively prevent reverse watering, allowing water to flow in the correct direction and eliminating backflow issues. It safeguards your ventilation system by stopping water or other liquids from reversing into the fan or ductwork. - Barrier Against Contaminants: In addition to preventing backflow, this backdraft damper acts as a barrier against dirt and debris entering your ventilation system. This feature helps maintain a clean and safe environment in your kitchen or bathroom. - Versatile Sizes: Available in multiple size options (80 mm, 100 mm, 110 mm, 120 mm, 150 mm, 200 mm), this damper can be easily installed in various round ducts. Select the size that best fits your specific ventilation system for optimal functionality. Use Scenarios: 1. Install in kitchen exhaust systems to prevent grease and moisture from re-entering your living space. 2. Use in bathroom ventilation to ensure odors and humidity are effectively expelled without backflow. With its robust construction and essential functionality, this backdraft damper is a must-have for any ventilation system, ensuring efficiency and cleanliness in your home.