Description: 【Water meters part】 Inner Plug Check Valve is Designed specifically for water meters, this check valves prevents reverse flow and dry running, ensuring accurate water measurement and protecting your system 【Design】 Check Valve Features an internal spring mechanism for reliable sealing, making it ideal for garden irrigation, aquariums, household plumbing, and various industrial applications 【Material】Made from POM material that resists wear, providing long time performance in both residential and commercial environments 【Easy Installation】: Directly replace the Inner Plug Check Valve, easy to install 【Application】Water Meter Valve is Suitable for water treatment systems, swimming pools, pond, aquaculture setups, cooling circuits, heating systems, industrial processing lines and more Size Chart:2.45cmx2.2cm/0.96inchx0.87inch Package Includes: 5 Inner Plug Check Valve Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.