Extended Silicone Design Lengthened and thickened construction to guarantee a secure seal for 110mm pipes, preventing leaks and sewer gases with its reliable closure mechanism. Triple Sealing System Combines embedded sealing plates for molecular putty and silicone rings to provide enhanced resistance and pest protection through multiple barrier protection. AutoClose Flap Mechanism Gravityactivated 90degree flap automatically seals when dry and opens during drainage to block sewer gases while accommodating higher water flow. General Compatibility Fits most toilet types including split singleunit and models with 100110mm PVC pipes, enabling straightforward installation without requiring special tools. Use scenarios Bathroom remodel or installation with 110mm drainage line: ensures a secure seal and odor control from the outset. Replacement in traffic or commercial bathrooms: multilayer sealing and pest protection maintain reliable performance during heavy use. DIY retrofit for homes with 100110mm PVC pipes: tool, straightforward installation without special tools. Key attributes at a glance Function: secure seal for 110mm pipes, automatic gas blocking, water flow accommodation. Compatibility: broad fit for toilet types and 100110mm PVC pipes. Size: 110mm pipe compatibility; 100110mm range for PVC models. Material: extended silicone design with sealing plates and silicone rings. Performance: leak prevention, sewer gas blocking, pest resistance, and easy operation.