Nonreturn check valve fully made of brass with a spring mechanism to let the water flow only one way. The check valve can last maximum pressure of 12 bar. There is a range of sizes available. Specifications: - Material: Brass; - Insert material: Brass; - Size: 1/2″, 3/4″, 1″, 1 1/4″ (5/4″), 1 1/2″ (6/4″) or 2″ BSP; - Thread type: Female x Female; - Max. Static Pressure: 1,2MPa (12 bar); - Max. Working Temperature: +100C; - Gasket type: NBR (flat).