Unit 225 - 500 Litres of resin 225 - 500 Softener Capacity as CaCo³ 200ppm (m³) 56.2m³ - 125m³ Softener Capacity as CaCo³ 250ppm (m³) 45m³ - 100m³ Softener Capacity as CaCo³ 300ppm (m³) 37.5m³ - 83.3m³ Salt Consumption (kg/reg) 27 - 60 Flow rate - nominal (m³/hr) 9 - 18 Minimum metered 300 Litres / Hour