SpectraPure Line Pressure Reverse Osmosis/Deionization Five-Stage MaxCap 180 GPD System Two 90 gallon per day, 99% high-rejection thin-film composite Reverse Osmosis Membranes 2:1 waste ratio produces 50% less waste water 33% larger High-Capacity SuperDI MaxCap DI Cartridge has 4 times more capacity than a typical mixed-bed DI cartridge 33% larger High-Capacity SuperDI Silica-Buster DI Cartridge maximizes silica & phosphate removal Ultra-high efficiency 0.5 micron MicroTec Sediment Pre-Filter.