The water inlet and emptied device of the buried eyewash is installed below the permafrost. Open the valve, and the tap water flows into the eyewash system from the underground water inlet. Close the valve, and the system can automatically emptied the water in the eyewash pipe. Applicable to the winter below 0 degrees of the area, the depth of the permafrost is greater than 500MM to use, really play the anti-freezing effect. Patented products, counterfeiting will be prosecuted; Patent number: ZL 2012 2 0337278.7