The Caleffi iStop 28mm Anti Freeze Valve is a premium quality unit made of brass, designed to prevent freezing in air source heat pumps. Manufactured in Italy by the reputable brand Caleffi, this anti-freeze valve ensures efficient and reliable operation, making it a crucial component for maintaining the functionality of your heating system. With its durable construction and innovative design, the Caleffi iStop 28mm Anti Freeze Valve is a must-have for any home plumbing setup.
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