FIELD: crop growing.SUBSTANCE: invention relates to the field of plant growing and may be used for plant growing in a closed ground. System includes a reservoir, a well-pressure regulator with a septum. Pressure regulator chambers include a valve. Valve is connected to the stem. Rod is fitted with guides. Guides are rigidly connected to the float for axial movement up or down. Articulated valve actuator consists of a lever. Valve is connected to the rod with guides and a float. Pressure regulator well is connected to the heating pipelines. Pipelines have branch pipes-water outlets with end sections located in one horizontal plane. Ends of the heating pipes are united by a collector and connected to a regulating well with a water-filled chamber. Shut-off valve with a rod with guides rigidly connected to the float is installed in the chamber. Float is located below the plane of the location of the water outlets of the branch pipes and water outlets. Efficiency is ensured, the system design is simplified and the
