The SPECTRUM RO Twist-Lock cartridge is an ultra compact solution that efficiently combines reverse osmosis (RO) technology with inline cartridge filtration.Employing the same quick-connect fitting for easy installations the single cartridge design requires no water storage tank, providing a constant supply of pure water.Temperature range: 5-40°CAverage rejection rate: 97%Maximum TDS: 2,000 ppmpH range: 4-10