The PuROLine PL40T50 4 Stage Reverse Osmosis System is a USA made RO system that can store up to 16 gallons water per day. It has an inbuilt desel membrane that offer better protection to chemicals in your drinking water. It contains high capacity to separate minerals from water.? It has a 3.2 gallon storage tank that has 5 year warranty and features an auto shut off valve to prevent loss of extra water. It has branded john guest fittings parts that can give you secure pipe connection and tubes. It offers NSF certified standard 65 lead air gap faucets that can prevent the coming of chemical back flow to your RO system. There is a lifetime warranty on the faucets.?