This filtration system an ideal solution for large beverage and coffee equipment, and ice machines that produce 500 lb. - 1000 lb. per day. This filter system features a flow rating of 1.67 GPM and an 18,000-gallon capacity. It has 3/8" NPT female input and output connections. The filter cartridge must be replaced every 3-6 months, or at the rated capacity, or if a noticeable reduction in flow rate occurs. The Oceanloch twist-in design is unique to Oceanloch filters and is not compatible with filter systems from other lines.