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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  • Zilmet ZHT24-60 6.3 Gal Cal Pro Hydronic Expansion Tank, 1/2 in Connection, NPT Connection, Carbon Steel
    MSRP: $288.54
    $118.19
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  • Zilmet ZSP12 3.2 Gal Solar Plus Tank 3/4'' NPT Connection
    MSRP: $174.36
    $113.24
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  • Zilmet ZEP18 6.3 Gal Easy Pro Thermal Expansion Tank, 3/4 in Connection, NPT Connection, Carbon Steel, Almond
    MSRP: $564.48
    $112.42
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  • Zilmet VSG12 Temperature Reducing Pre-Vessel 3.2 Gal Solar Expansion Tank, Two 3/4'' NPT
    MSRP: $181.16
    $110.28
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  • Zilmet ZS05 0.13 Gal Stainless Steel Tank 1/2'' NPT Connection
    MSRP: $229.30
    $105.30
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  • Zilmet VSG8 Temperature Reducing Pre-Vessel 2.1 Gal Solar Expansion Tank, Two 3/4'' NPT
    MSRP: $156.16
    $94.67
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  • Zilmet VSG5 Temperature Reducing Pre-Vessel 1.3 Gal Solar Expansion Tank, Two 3/4'' NPT
    MSRP: $148.40
    $88.91
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  • Zilmet ZS160 0.04 Gal Stainless Steel Tank 1/4'' NPT Connection
    MSRP: $182.76
    $85.87
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  • Zilmet ZHT18-30 4.8 Gal Capacity Cal Pro ZHT18-30 Hydronic Expansion Tank, 1/2 in Connection, NPT Connection, Carbon Steel
    MSRP: $157.50
    $74.29
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  • Zilmet ZHT8-15 2.1 Gal Cal Pro ZHT8-15 Hydronic Expansion Tank, 1/2 in Connection, NPT Connection, Carbon Steel, Gray
    MSRP: $126.00
    $57.94
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  • Zilmet ZEP1 Expansion Tank and Shock Arrester, Butyl/304 Stainless Steel, MNPT Connection
    MSRP: $256.00
    $43.38
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  • Zilmet ZFT8R 2.1 gal flat rectangular hydronic tank with 1/2" NPT connection, union (two-way check valve), and welded bracket
    MSRP: $269.28
    $118.92
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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.