The Caleffi iStop 28mm Anti Freeze Valve is a high-quality unit made of brass, designed to prevent freezing in air source heat pump systems. Manufactured in Italy by the reputable brand Caleffi, this anti-freeze valve ensures efficient protection against frost and ice buildup, maintaining optimal performance in heating systems. With its reliable design and durable material, the Caleffi iStop 28mm Anti Freeze Valve is a valuable addition to any plumbing and heating system.
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