Copper and brass

Copper and brass are the best metallic conductors apart from silver, which explains why electricity cables are made of these materials. They are also excellent for maintaining heat, so it keeps the water inside the espresso machine very stable.

As long as your water has a normal PH level the copper and brass work fine. The downside however is that you need to keep an eye out on your water quality. When water has a high acidic level it will react with the copper, this can leave oxidation and solvents.

To prevent this the all new Strietman CT2 has a stainless steel inside boiler dome and stainless steel lined cylinder wall.