Durable brass construction Made of brass, this floor drain backflow preventer is built to last. It is resistant to temperatures and offers longlasting durability without deformation. Effective backflow prevention When drainage stops, the device automatically closes, preventing backflow and the entry of sewer odors into the space. This helps maintain a clean, hygienic environment. Quick, unobstructed drainage Designed with an opening and closing mechanism, it provides fast drainage and helps eliminate stagnation and clogs, ensuring smooth wastewater flow. Easy installation and compatibility Features a simple interface compatible with a wide range of drainage holes. Installation is tool and straightforward, with no complicated procedures required. Use scenarios Residential bathroom floor drains to block backflow and odors Laundry room or utility area floor drains to maintain drainage during spills or heavy use Basements, garages, or commercial spaces with floor drains for reliable backflow protection during heavy rainfall or flooding