Never use these RO filters for drinking water solution. It is better to use porcelain candles water filters because they only remove bacteria and virus from them and not the essential minerals. RO filters remove all the essential minerals from the water through a semipermeable membrane by the process called Reverse Osmosis (RO). This leads to serious health issues in 5-10 years causing osteoporosis, digestive problems due to low enzymatic actions. disturbed haemostasis resulting in various diseases like Indigestion, hyper acidity, Vit B12 deficiency causing nerves related diseases, also heart problems and hypertension and arthritis. Minerals are something that we get only from water and very little from fruits and vegetables. When RO removes these minerals bringing down the TDS (Total Dissolved Solutes) meaning the total amount of minerals dissolved in natural water whose TDS is 250 -400. The TO brings down this level to 50-60 which is hazardous for your health. This is just like distilled water which has almost 30-40 TDS and is not recommended for good health.