Temperature-resistant water tanks are generally made of stainless steel because stainless steel is the only material that does not get affected by environmental factors. Installing a plastic or PVC or concrete water tank on your rooftop means getting boiling hot water during summer and freezing cold water during winter but when you install a temperature-resistant stainless steel water tank made of premium grade stainless steel just like Purever Cuzart range, you would continue getting normal degree temperature water even in winter or summer.