The copper tubing used was found in serviceable condition after more than 5,000 years. Copper is an essential part of the human diet. It helps iron-rich foods make red hemoglobin in the blood. In fact, it is essential for the normal healthy growth and reproduction of all higher plants and animals. Copper is present in a wide variety of vegetables, fruits, grains, meats, seafood and chocolate, as well in drinking water.
Copper is biostatic.
That means bacteria will not grow on its surface. Copper doorknobs are used to protect against the transfer of disease in hospitals. Copper is the standard benchmark for electrical conduitivity. It conducts electrical current better than any other metal except silver.