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 ZHT80 21.1 Gal Cal Pro Hydronic Expansion Tank 3/4" Connection with ZAFL2234 ActiveFlo Lite Point of Use Water Conditioner
    MSRP: $1,363.24
    $363.19
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  • Zilmet ZEP1 Expansion Tank and Shock Arrester, Butyl/304 Stainless Steel, MNPT Connection with ZAF012MF 1/2'' MNPT X 1/2'' FNPT Activflo Solo Water Conditioner
    MSRP: $1,166.98
    $217.26
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  • Zilmet ZEP5 2.1 gal In-line thermal expansion tank with 3/4" Stainless steel NPT connection with ZAFL2234 ActiveFlo Lite Point of Use Water Conditioner
    MSRP: $1,054.28
    $177.21
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  • Zilmet ZEP12 4.8 gal In-line thermal expansion tank with 3/4" Stainless steel NPT connection with ZAFL2234 ActiveFlo Lite Point of Use Water Conditioner
    MSRP: $1,136.28
    $197.48
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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 Zilmet ZAF012MF 1/2'' MNPT X 1/2'' FNPT Activflo Solo
    MSRP: $1,190.46
    $283.26
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  • Zilmet ZEP18 6.3 Gal Easy Pro Thermal Expansion Tank, 3/4 in Connection, NPT Connection, Carbon Steel, Almond with ZAFL2234 ActiveFlo Lite Point of Use Water Conditioner
    MSRP: $1,316.36
    $229.63
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  • Zilmet ZHT50-90 13.2 Gal Hydronic Tank 3/4'' NPT Connection with ZAFL2234 ActiveFlo Lite Point of Use Water Conditioner
    MSRP: $1,139.54
    $292.73
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  • Zilmet ZHT50F 13.2 Gal Hydronic Tank 3/4'' NPT With Feet with ZAFL2234 ActiveFlo Lite Point of Use Water Conditioner
    MSRP: $1,234.46
    $312.32
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  • Zilmet ZHT700 184.9 Gal Hydronic Tank 1'' NPT Connection with ZAF010 ActivFlo Whole House Water Conditioner
    MSRP: $8,926.30
    $2,961.65
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  • Zilmet ZHT600 158.5 Gal Hydronic Tank 1'' NPT Connection with ZAF010 ActivFlo Whole House Water Conditioner
    MSRP: $7,423.70
    $2,534.41
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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 Zilmet ZAF012MF 1/2'' MNPT X 1/2'' FNPT Activflo Solo
    MSRP: $1,036.98
    $229.40
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  • Zilmet ZS05 0.13 Gal Stainless Steel Tank 1/2'' NPT Connection Zilmet ZAF012MF 1/2'' MNPT X 1/2'' FNPT Activflo Solo
    MSRP: $1,140.28
    $279.19
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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.