Maintenance-free for two years. Unique nozzle system delivers contaminant-free Eyesaline® solution (sold separately) at a constant rate to safely flush eyes. Highly visible station features a sure-grip handle for instant activation, basin dust cover, waste fluid reservoir, and integral valve for easy draining without messy clean-up. Gravity-fed flow rate and flushing stream height are constant during the entire 15-minute wash cycle. Ergonomic design signs show service instructions. Safety-sealed activation pull-strap displays expiration date. Maintenance-free Eyesaline Cartridges have a 24-month shelf life, require no special plumbing, and are easy to replace. Meets ANSI standards. SEI certified. Sold individually.