Design: Our one way drain valve uses a -driven mechanism that automatically opens when water flows and closes tightly when no water is present, forming an effective barrier against foul smells and sewage backflow. Brass Floor Drain: This odor proof floor drain is crafted from high-quality rustproof brass with a galvanized finish and a flexible silicone sealing ring for long-lasting performance. Easy Installation: The shower floor drain backflow preventer adopts a true plug-and-play structure that requires no tools, glue or complicated steps, so even girls and beginners can install it in minutes. Simply insert it into a 1 1/2"-1 5/8" hole and press firmly to achieve a secure fit, Multifunctional Applications: Designed as a versatile shower drain plug and floor drain backflow preventer, this brass drain filter is compatible with most standard floor drains found in homes and apartments., Weight: 0.1543235834 Pounds, Manufacturer: Gishbjka