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Introducing our reliable expansion tank designed for closed-loop heating systems. Made from durable steel with a polymer coating to ensure longevity and resistance to corrosion, this tank has a spacious 2.1 gallon capacity and a slim profile that occupies less space while providing ample water storage. The port offers easy installation and maintenance, making your life easier. This product is not only safe for use with hazardous materials but also ships via air without any restrictions. Say goodbye to high repair costs and prolong the life of your heating system by investing in this quality expansion tank today! It is a perfect solution for homes and offices seeking an efficient way to regulate pressure in their closed-loop heating systems.