Relevance of developing the equipment for electro-hydraulic treatment of water and its solutions was substantiated. The device that is one of the electro-hydraulic spark gap installation components has been developed in order to eliminate the drawbacks of similar devices used. The application field of the device for electro-hydraulic treatment of solutions is crop production in agriculture. Electro-hydraulic treatment can be used to produce fertilizers in conditions of irrigation of greenhouse vegetable crops in personal subsidiary and peasant (farmer) farms. The installation, in addition to the cylindrical tank, contains a voltage source, a high-voltage transformer, an autotransformer, energy storage devices, rectifying cells, start-control devices and means of control and measuring. Electrodes are installed in this device, one of which has a technical scientific novelty. The tip of the negative electrode is hemispherical, which allows increasing the stored energy in the capacitor, to increase it in the discharge channel, increasing the length of the spark discharge in the liquid. The model of the device has been developed in order to substantiate the design parameters and operation modes. The developed electric diagram required for installation, runup and control of technological modes of electro-hydraulic impact on liquid media is shown. Actual model of the device is presented in photo content. The perspectivity of studying the electro-hydraulic effect is determined.