• ProLine® Master Gas Water Heaters

    Built with commercial-grade components, our ProLine® Master gas water heaters come with an 8-year warranty. With their impressive combination of innovation and durability, these models are designed to deliver years of reliable performance.


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A.O. Smith products are available through independent plumbing contractors.

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  • The ProLine Master Gas Water Heaters bring commercial-grade design into the residential setting, offering a wide range of water heating solutions for many different types of homes.

    All A. O. Smith products use CoreGard™ stainless steel core anode rods, but the ProLine Master Series has increased anode protection with either larger or multiple anodes depending on model. Ultra-low NOx units are available where required.

    Efficiency & Reliability For Your Home

    A. O. Smith ProLine water heaters are both efficient and reliable. Our residential products are built with the same technology and care as our industry-leading commercial line. They’ve been thoroughly tested in our labs to ensure that they last, and that means peace of mind for you and your family.

    Industry-Leading 8-Year Warranty

    All A. O. Smith water heaters are backed by top-notch tank and parts warranties. Our ProLine Master products, offers extended 8-year warranty protection.

    Added Tank Protection

    Larger commercial-grade stainless steel core anode rods that provide exceptional tank protection. Longer-lasting commercial-grade stainless steel upper and lower elements


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