Traditionally, washing just one pair of denim pants would require about 22 gallons of water, but the green tech washing machines at the Saitex USA factory in Vernon use less than one-fifth of a gallon. General Manager David Chang says that’s … equivalent to saving over 10 million gallons of water per year. Saitex does this by using a recycled water filtration system. While California is experiencing extreme drought with its driest year in a century, Saitex has invested in a future with less water.