Advanced Check Valve for Improved Toilet Backflow and Sewer Odor Prevention

Advanced Check Valve for Improved Toilet Backflow and Sewer Odor Prevention. 5+ Years Warranty: Covers manufacturing defects with 100% free replacement in next shipment. 100% Airtight Seal: Advanced flange base prevents odor, moisture, and gas leaks permanently. Universal Fit: Compatible with standard 3-inch and 4-inch sewer pipes. Premium ABS Framework: Rigid ABS core ensures stable mounting and uniform compression. Custom Color Option: Available in blue or customized color upon request. OEM/ODM Service: Custom logo, private-label packaging, and tailored specs available. Anti-Backflow Design: Built-in one-way check valve isolates sewer and prevents backflow. 17 Years Expertise: Decades of manufacturing experience ensure high reliability.