Check Valve, Swing Check Valve DN20 232PSI 3/4 Female Brass Water Check Valve One Way Thread Non Return Check Valve to Prevent Water Backflow Specifications: Connection form: thread; Structural form: swivel type; Nominal; diameter: DN20; Theme: 3/4BSP; Working Temperature: Normal Temperature Durable: This check valve is made of high quality brass, solid and durable. It is convenient to use and easy to install, there is an arrow to indicate the direction. Application: The water check valve is normally used for water, the pressure rating is 232 PSI. Connections: The check valve uses a standard DN20 internal thread which is ideal for many connections. Direction: This is a check valve, which allows water to flow in only one direction. Note: The data is all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.