With an in take that is less than the overflow rate you will avoid the disaster of a tank overflow.
Protection against an overflowing tank is made possible by the 150mm overflow provided with every Pioneer water tank, the largest overflow on the market. The down pipe on Pioneer water tanks is the largest on the market as well.
Preventing the steel from coming into contact with any water is the PVC wall which is one single solid piece. It also means there is no need for sealants based on chemicals, so that you're not going to get any contaminants from such chemicals in your water.