Sperian Fendall Eyewash Cartridges - 3.49 gal - For Eyeglasses - 2 / Set Eyewash station is designed for use with the Products For You 15 minute Pure Flow Eyewash Station 1000. Each Pure Flow contains 3.5 gallons of preserved, buffered, pH-balanced, saline solution. installation takes less than 5 minutes. offers a 24-month life.