Self-contained gravity flow eye wash units use gravity to deliver water through dual spray heads|Top operate unit, fill unit with clean potable water and add bacteriostatic additive (supplied with unit)|Water flow is activated by pulling down on bright yellow eye wash tray|Integral full flow nozzles deliver soft spray of water, swing tray up to storage position to stop flow|Waste water is directed into drain opening in tank basin, 3 ft. long drain hose in basin directs discharge into floor drain, storage tank or other receptor