Vulcan is an electronic water treatment system that protects your piping, boilers, water heaters, appliances, faucets & fittings and other equipment against scale deposits and rust. The Vulcan-Impulse-Technology is based on the principle of physical water treatment. Specific electronic impulses change the crystallization of calcium so it can no longer form hard scale deposits.Vulcan is easily installed on the outside of the pipe and electronically prevents scale from forming in the pipes and anywhere the water flows.