There are lots of stainless steel water tank in the market, most of them are made by 304L stainless steel, few are made by 316L stainless steel.
No matter what stainless steel we used, there will be the same problem for anti-corrosion. As we know normally we use the Magnalium Anode for protecting the tank. But the Magnalium Anode should be changed every year even every 1/2 year according to the water quality. Magnalium Anode is cheap, but labor cost is expensive.
Our new arrival Titanium Impressed Anode is designed to serve more than 10 years and needs no maintenance or replacement.