Expansion Tanks

Discover a range of expansion tanks designed to fit your specific water heater needs, ensuring optimal performance and efficiency. We carry the highest quality brands at the most affordable prices available.

129 products
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  • Watts 0067370 PLT-5 Potable Water Expansion Tank, 2.1 Gallon Tank
    MSRP: $154.50
    $79.26
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  • Watts 0067371 PLT-12 Potable Water Expansion Tank, 4.5 Gallon Tank
    MSRP: $217.50
    $116.42
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  • Zilmet ZS18 4.8 gal in-line: Stainless steel expansion tank with 3/4": Stainless steel NPT connection
    MSRP: $960.68
    $427.90
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  • Zilmet ZFT8C 2.1 gal flat round hydronic tank with 1/2" NPT connection, union (two-way check valve), and welded bracket
    MSRP: $243.58
    $101.77
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  • Zilmet ZFT24R 6.3 gal flat rectangular hydronic tank with 1/2" NPT connection, union (two-way check valve), and welded bracket
    MSRP: $560.48
    $210.14
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  • Zilmet ZFT18R 4.8 gal flat rectangular hydronic tank with 1/2" NPT connection, union (two-way check valve), and welded bracket
    MSRP: $440.64
    $161.14
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  • Zilmet ZFT18C 4.8 gal flat round hydronic tank with 1/2" NPT connection, union (two-way check valve), and welded bracket
    MSRP: $279.48
    $112.56
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  • Zilmet ZEP5 2.1 gal In-line thermal expansion tank with 3/4" Stainless steel NPT connection
    MSRP: $302.40
    $59.37
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  • Zilmet ZEP12 4.8 gal In-line thermal expansion tank with 3/4" Stainless steel NPT connection
    MSRP: $384.40
    $80.18
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Increase Your Water Heater Efficiency

Whether you're upgrading your water heater or replacing an old hydronic tank, Plumbing Deals has the solutions you need. Our handpicked expansion tanks combine quality, efficiency, and affordability, ensuring that your water heater operates at its best. Our selection includes hydronic, vertical, horizontal, and floor mounted tanks.

Let's make your water heater's performance exceptional! Dive into our expansion tank selection, seize fantastic deals, and let our products keep your water heater efficient, your comfort levels high, and your budget intact. Start browsing our categories now, and let's make every shower, bath, and chore a satisfying and efficient experience.