Stable, high-quality check valve for a wide range of applications. For example, when operating two pumps, if one fails, it prevents the water flow from running backwards through it, which would then prevent any more water flow reaching the coolers. In addition, when installed directly behind the pump during the initial filling, it makes filling and venting easier. Technical data: Material: PP Dimensions: 7cm long, max. diameter 2.2cm Switching pressure H2O: in our test from 120 mbar = 0.120Bar (for comparison: 400l pump delivers approx. 60mbar) Manufacturer information: Switching pressure for air 120 mbar, maximum load 2000 mbar Connection: for hoses with 6-8mm inner diameter Temperature range: 5-80°C Pressure range: 0-2Bar Scope of delivery: 1x check valve 6-8mm