Manufactured in a modern, automated plant using European Technology, Protects the tank from rust and corrosion. Withstands temperatures up to 1000c Long Lasting, even in hard water. Reduces scale formation. Prevents premature element failure. Low density, Glasslined element for long life in hard water areas. A special device to enhance the corrosion protection of the tank by means of "Cathodic action". Acts as presuure release valve, non-return valve, drain valve, expansion valve and vacuum release valve.