If you are considering tanks made of stainless steel, you should think about the potential use for it. Tanks made from stainless steel can be recycled. They are likely to be sold to any type collection companies that are willing to pay for your tank to think that the cost of the tank was spent. More info: https://www.huaromembrane.com/product/Stainless-Steel-Water-Pressure-Tank-Water-Softening-Tank-443.html