The PVC Transparent Check Valve is an indispensable tool for preventing backflow in kitchen drainage systems. By allowing water to only single direction, this valve helps maintain the integrity of your plumbing system. Its transparent design provides a clear view of the water flow, making it easy to detect any issues. Features -Color:Sky-blue -Material:PVC -Size:10.00X7.70X7.70cm/3.93X3.03X3.03in -Outer diameter: 55.4mm -Inner diameter: 50mm -Wall thickness: 2.7mm -Robust PVC material: constructed from durable PVC, this check valve offers excellent resistance to wear and high temperatures, ensuring longevity -Antibackflow feature: designed to prevent water backflow, this valve helps to keep kitchen drainage systems keep from smells and waste water backups -Oneway flow function: the ensures that water flows in only single direction, protecting the plumbing system from potential backflow problems -Easy to install: with a simple design, this check valve can be easily installed in various kitchen drainage pipes without requiring professional tools -Transparent pvc: the clear construction allows for easy monitoring of water flow, ensuring the functioning properly Package list: 4 x valve