This check valve is a crucial accessory for water dispensers, designed to prevent back-flow and maintain water purity. Constructed from plastic, it offers performance and reliability. Its universal design ensures compatibility with various water systems, making it an essential addition to any setup focused on delivering clean, safe drinking water. Features -Color:White -Material:Plastic -Size:5.00X2.30X2.30cm/1.97X0.90X0.90in -Hole diameter: 12.5 mm. -Optimal back-flow prevention: the -way check valve ensures no water back-flow, maintaining the purity of your water dispenser and protecting user health -Leakage solution: this accessory effectively addresses water dispenser leakage issues, preventing water wastage and providing a worry-free user experience -Versatile use: suitable for various water dispenser brands and models, it is ideal for use in homes, offices, schools, and commercial spaces, catering to different needs - construction: made from excellent materials, it features excellent damage resistance and wear prevention, ensuring durability and reliability -Quick installation: the accessory is easy to install, requiring just a few simple steps, eliminating the need for professional help and saving Package list: 2 x check valve