Caleffi 1″ and 5/4″ Anti-Freeze Valve

Caleffi anti-freeze valves are designed specifically for heat pump systems and provide automatic protection against freezing in the hydraulic circuit without the need for an external power source. They allow the circulating fluid to be drained when the temperature drops to approximately 3°C, thereby preventing ice formation in the system circuit—which is typically equipped with a heat pump—and protecting both the equipment and the piping from potential damage.