Abstract: Described from the technical point of view are the restoration of an evacuated tank by injecting water, its working procedure and points for attention. Discussed are its advantages over other restoring methods: applicabability (independent of tank volume, damage, and tank type), labor economy, low equipment requirement, and cost effectiveness. External support can be disregarded during restoration for a tank with capacity upto 2 000 m³, which has enough bearing capacity against water pressure. But for a larger tank, its bearing capacity shall be evaluated, water pressure on tank strictly controlled and external suppprt installed for purpose of safety. Pressurization with oil is prohibited due to' its dangerous potential.