Our Light Commercial Reverse Osmosis - No Pump makes 100-400 GPD, and is designed for those applicaltions where space is limited and there is no electrical. Like our Genesis Series, this unit offers a high quality R.O. system at an unbeatable price. With NSF listed filter cartridges, this unit is made of the highest quality components and follows strict TQM procedures for customer satisfaction. All units are water tested to ensure that the membranes are rejecting properly and that auto shut-off and check valves function when pressurized.