For cold weather months, AXEON Water Technologies’ HF5 Series Membranes are the only choice in keeping your system running smoothly. Not only do they offer up to 2,500 GPD and 98.5 percent rejection, but at 80 psi, they have the lowest operating pressure of any polyamide membrane in the industry. This means reduced energy costs as well as reduced stress on the membrane, the membrane housing, the fittings as well as the pump and motor.