Key benefits Quiet operation: spring loaded flapper design reduces water hammer noise for a calmer drainage experience. Easy visual inspection: transparent valve body lets you monitor the flapper movement and overall flow at a glance. Durable and reliable: built from robust materials for long lasting performance. Simple compatibility and setup: designed for 2 inch plumbing systems with a straightforward installation. refer to the size chart to confirm fit for your setup. Product overview This silent sewage check valve uses a spring loaded flapper to minimize noise while preventing backflow. The transparent valve body provides a clear view of flapper position and flow, enabling quick verification of proper operation. Built from robust materials, it is designed for long term use in 2 inch drainage applications. For fitment, please consult the size chart to ensure compatibility with your system. Key attributes Function: check valve with a spring loaded flapper to reduce water hammer and prevent backflow Body: transparent valve housing for at a glance monitoring of flapper movement and flow Construction: robust materials selected for durability Compatibility: designed for 2 inch plumbing systems; size chart should be consulted to confirm fit Installation: designed for hassle installation in suitable 2 inch lines Practical uses Residential basements or utility rooms where sewer line noise occurs and backflow prevention is needed Small to medium commercial restrooms or kitchens that require quiet operation and reliable backflow protection Retrofit projects in existing 2 inch drainage lines where monitoring of valve status and flow is desirable for maintenance and reliability