1. Innovative triple antibackflow feature: this washer drain seal uses a oneway flap to prevent sewage backflow while keeping insects out, helping maintain a freshsmelling environment and eliminating odors from unused drains. 2. Robust dualmaterial construction: built with strength stainless steel and a flexible silicone sleeve for durability, this seal adapts to a range of pipe diameters for versatile installation. 3. Elevated drainage performance: a large 75 mm channel diameter enhances drainage efficiency by 50%, effectively handling significant wastewater volumes without clogging. 4. Compact and spaceefficient design: a flat profile allows unobtrusive installation in small areas, addressing space challenges posed by traditional floor drains and maximizing usable space. Use scenarios: In a laundry area, install under a washing machine drain to prevent backflow and deter pests while maintaining a clean, odor environment. In tight utility or basement floor drains, use this seal to improve drainage performance and reduce odors in confined spaces. In bathrooms or showers with limited space, deploy the seal to enhance drainage and protect against backflow without intrusive hardware.