General Description: The backflow preventer in the shower floor is an important device to prevent unpleasant odors and water backflow. It is designed to fit drains with a diameter of approximately 35 to 37 mm and fits most installations in kitchen sinks, bathrooms, and toilet drains. Thanks to its unique design, it allows for quick drainage without water accumulation, while remaining clean thanks to its self-cleaning rotation function. Technical Specifications: Dimensions: 5.9 x 5.9 cm; Material: High-quality TPR and ABS; Type: One-way drain valve. Installation: The backflow preventer is easy to install. Simply insert the product directly into the drain. For cleaning, the filter element can be easily removed using the integrated handle. Application: This device is designed to prevent foreign objects from flowing down the drain and to prevent wastewater from entering the room through the drain pipe. It is ideal for use in showers, sinks, and toilets.