Key benefits Prevents backflow and protects downstream systems: the built‑in one‑way check valve stops wastewater backwash, helping maintain clean and safe effluent for household or industrial systems. Quick, tool‑ installation: designed for use without special tools or professional skills so you can restore normal flow fast. Durable performance for continuous use: rigid PVC construction resists oxidation and wear for long service life under continuous flow. Size options for better fit: available in 5 cm and 11 cm diameters to match different pipe and system requirements. What it does One‑way check valve design prevents reverse flow of wastewater, reducing contamination risk and protecting pumps, filters, and downstream piping. Simple mounting and connection mean minimal downtime during replacement or retrofit. Rigid PVC body provides chemical and wear resistance suitable for wastewater environments. Key specifications One‑way check valve functionality (prevents backwash) Sizes: 5 cm diameter and 11 cm diameter Material: ‑quality PVC with oxidation and wear resistance Intended for continuous flow service Typical applications Residential septic or sewer outfalls where backflow from municipal lines or low sections can occur. Commercial kitchens, laundry rooms, or small treatment plants to protect internal drains and grease traps from reverse flow. Irrigation, pump discharge, or light industrial wastewater lines that require a reliable one‑way valve and durable PVC construction. Why choose this product Solves common backflow problems with a simple, reliable one‑way valve. Two size choices improve compatibility with existing plumbing. Durable PVC construction reduces maintenance and extends service life while remaining straightforward to install.