ALPS is a natural gravity fed water filtration system that is designed to remove all types of contaminants in tap water via a ten stage filtration process. Lab tests conducted by Cairns RegionalCouncil showed almost no detectable sodium fluoride levels, or any other harmful/dangerous chemicals. The ALPS water filter represents a natural, simple, easily maintained and cost effective apparatus, that will provide you with a consistent supply of clean and healthy drinking water, essential for general health, longevity and quality of life.Assembly is simple along with a straight forward maintenance routine. All parts and components are inexpensive and readily available. Usually, domes and cartridges are replaced every 6 - 9 months, depending on your tap water quality and quantity used. Mineral stones are generally replaced every 12 - 18 months.ALPS water samples were analysed by Cairns Regional Council, Water and Waste Laboratory Services - 38 MacNamarra Street (P.O Box 359, Cairns QLD 4870), whereby a formal certificate of analysis was supplied in accordance with NATA's accreditation requirements, verifying the efficiency of the ALPS water filtration system.THE ALPS WATER FILTER IS DESIGNED TO REMOVE ALL KINDS OF CONTAMINANTS IN YOUR DRINKING WATER VIA THE FOLLOWING 10 STEPS.1. Dome Ceramic Filter with silver particle (0.2 micron): Purifies water from rust, dust, sand, silt and bacteria such as cholera, typhoid and coliforms. NSF APPROVED.2. Silver Activated Carbon (1st layer of cartridge): Carbon adsorbs chemicals and traps dirt, rust, silt, chemicals and chlorine.3. Zeolite (2nd layer of cartridge): Zeolite softens water and has a strong affinity for heavy metals and adsorption of harmful elements, including fluoride.4. Silica Sand (3rd layer of cartridge): Silica promotes healthy bone, connective tissue and helps prevent premature aging, cardiovascular and Alzheimer's disease and keeps water cool and fresh.5. Mineral Sand (4th layer of cartridge): Mineral sand reple... show more