Expansion Tanks

Discover a range of expansion tanks designed to fit your specific boiler needs, ensuring optimal performance and efficiency. We proudly carry the best brands on the market including Watts and Zilmet. Our handpicked expansion tanks combine quality and affordability, ensuring that your boiler system runs smoothly.

127 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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Premium Boiler for Maximum Comfort

Welcome to Plumbing Deals, your source for high-quality expansion tanks designed to enhance the efficiency and lifespan of your boiler system. We seamlessly blend affordability with top-tier quality. We carry some of the best performing names in the industry, including Watts and Zilmet. Whether you're a homeowner or a seasoned contractor, our carefully selected products are here to ensure your boiler operates at its best, without breaking the bank. Discover a range of expansion tanks designed to fit your specific boiler needs, ensuring optimal performance and efficiency.

Whether you're in the process of upgrading your existing boiler system, replacing outdated equipment, or embarking on a new project, Plumbing Deals is here to provide tailored solutions to meet your specific needs. Elevate your boiler's performance to exceptional levels with our wide array of products and expertise. Delve into our carefully curated expansion tank selection, where you can find not only quality products but also amazing deals that fit your requirements. Our goal is to ensure that your boiler operates efficiently, your comfort remains at optimal levels, and your budget stays intact. Explore our diverse categories today, and together, let's transform every heating season into a truly satisfying and efficient experience.