As part of the GARDENA Sprinkler System, GARDENA control and shut-off valves are used for manual control and shut-off of individual pop-up sprinklers or entire groups of sprinklers. It is possible to smoothly adjust the water flow or completely shut it off. The recessed rounded lid disappears when the valve is opened inside, posing no obstacle to lawn mowing. The wide border prevents grass from growing into the lid. The removable filter prevents dirt from entering the valve when the lid is open. The GARDENA control and shut-off valve has a 3/4" external thread.