Description: Quality Feature:Does not contain any metal parts, suitable for all kinds of extreme environment liquid, acid and resistant to alkaline pH. A tightly sealed ball seal abandons the spring or weight design of a traditional check valve. The seal is stronger. When installed vertically, there is generally no requirement for minimum water pressure in the sealing water, and the water resistance is lower. High pressure resistance, it can withstand pressure up to 150PSI, which is equivalent to water pressure of 100 meters water column. No lead salt stabilizer, non-toxic and odorless, can be safely used in drinking water projects or corrosive pipelines. The single live connection design is convenient for subsequent disassembly, cleaning and quick replacement, and shortens the stagnant time of the pipeline due to maintenance. Specification:Product Type: Hemispherical Check Valve Material: pvc Pressure: 1 mpa Connection Form: Socket, PVC Glue Size: Inner Diameter 20-50mm Color: Black Quantity: 1Note:Transition: 1cm=10mm=0.39 inch Due to manual measurement, please allow 0-1cm error. Before bidding, make sure you do not mind. Due to differences between different monitors, the image may not reflect the actual color of the design. Thank you!Package Included:1 x Check Valve