No need of electricity or pressure, just filtrating by the pressure of the tap water, no waste water in the purifying process, safe and energy saving. Product Model: LD-Fc 20 Filtration technics: Ultrafiltration membrane + Activated Carbon Filtration precision: 0.01 micron Crust materia: 304 stainless steel Outer shape dimension: 250*1300mm The maximum water flow rate: 2000L/H (Litre/HOUR) Inlet and outlet pipes: 1/2" pipe thread Drain pipes: 1/2" pipe thread Water source: Municipal tap water Influx water pressure; 0.1-0.3 MPa Applicable temperature: 4-38ºC Useful life: ≥Three years ( when the unpurified water comes from city tap water, the filter core use life is different according to the different water quality, but the use life is not below 3 years.