Shower Floor Drain Backflow Preventer Valve is designed to stop water from backing up into the shower and to reduce sewer odors. This antiodor oneway core drain stopper allows normal drainage while blocking gases from the sewer, helping to keep the bathroom clean and comfortable. The unit is finished in black to match a variety of bathroom fixtures. Key benefits Prevents backflow from the sewer into the shower, protecting the shower, floor, and surrounding area. Reduces sewer odors by blocking gas entry with a oneway core. Maintains drainage flow while preventing unwanted backflow. Black finish provides a discreet, lowcontrast look with most bathroom decors. Key attributes Functionality: Backflow preventer valve with an antiodor oneway sewer core drain stopper. Color: Black. Compatibility: Designed for shower floor drain applications and typical drain configurations. Size: See listing for exact dimensions. Material: See listing for material composition. Performance: Helps prevent sewer backflow and odor intrusion while maintaining drainage. Use cases Use case 1: In a residential bathroom where backflow and odor control are a concern, especially in older plumbing or during heavy drain activity. Use case 2: During bathroom renovations or drain replacements to upgrade to a backflow preventer with odor control. Use case 3: In bathrooms located in basements or areas with a higher risk of sewer gas intrusion, helping to keep the space more hygienic while allowing normal water drainage.