One of the biggest advantages of stainless steel water tanks is their hygienic, non-porous surface, which prevents bacterial growth. Ever noticed how plastic tanks often develop a strange smell or taste over time? That’s because they react with sunlight and water, leading to microbial buildup. Stainless steel, on the other hand, maintains water quality for years without any unwanted changes. Another key factor is durability. While plastic tanks degrade and crack under extreme temperatures, custom water tanks made from high-grade stainless steel are built to withstand heat, cold, and even seismic activity.