Detachable assembly that integrates tee, bend, and straight sections, with sealing included for a complete, easytoinstall solution. Double antioverflow protection: sealing plug and deodorizing cores prevent overflow in oneway speed drainage channels. The selfclosing floor drain cores open when water flows and close automatically when water stops, helping to prevent odors and backflow. Pipe compatibility and seals: suitable for 32 mm to 46 mm pipes, with four silicone ring sizes for better adaptability and enhanced sealing across varied installations. Automatic drainage performance: closing floor drain cores enable smooth drainage with no obstructions. The system opens and closes automatically in response to the presence of water, delivering efficient and convenient operation. Use scenarios: Laundry room with washing machine discharge: provides reliable automatic opening and closing to manage wastewater while preventing odors when not in use. Utility rooms or balconies with flow drainage: robust antioverflow protection and deodorizing cores help manage sudden wastewater surges without backflow. Retrofit or build projects with 32–46 mm piping: silicone rings in four sizes ensure a precise, durable seal and easy adaptation to existing ductwork.