Gardena drain valve

As part of the sprinkler system, the drainage valve prevents frost damage to the underground installation. This is achieved through automatic drainage when the system is turned off. The valve opens at a water pressure of below approximately 0.2 bar in the system. Drainage valves should be installed at the lowest points of the irrigation system and should be embedded in a layer of washed coarse gravel for safe drainage. It features a 3/4" thread.