In this video, we delve into the age-old debate: Are water heaters from box stores truly the same as those from professional plumbing supply stores? To find out, we conducted a comprehensive comparison. We purchased an AO Smith water heater from a professional plumbing supply store and another from a box store, and then we meticulously examined each component, weighing them, and noting any differences.
Our journey began in Kansas City, where we obtained the AO Smith Pro Grade Heater from a plumbing supply store and enjoyed some famous barbecue. Next, we headed to Lowe's Home Improvement Store for the box store version, encountering some filming challenges due to store policies.
As we dissected the units, we discovered significant disparities. Despite claims that they are identical, our analysis revealed distinct variations in materials and construction. For instance, the pro-grade unit consistently weighed more, indicating potentially stronger materials. We observed differences in drain valves, control covers, burner assemblies, and more.
One notable finding was the presence of a metal cap on the back of the control valve in the box store unit, a feature previously absent and associated with frequent failures in older models. This change suggests manufacturers have made improvements, likely due to previous issues with box store units.
We examine the control valves, noting a slight difference in weight that indicates potential variations in internal components. Despite looking similar, these small differences can impact performance and longevity. We then move on to the anode rod, a crucial component for protecting the tank from corrosion. The pro-grade unit features a wider anode rod with a weld spot, indicating a magnesium material, known for better corrosion is protection compared to the aluminum rod in the box store unit.
Next, we weigh the empty tanks, revealing a substantial nine-pound difference between the two. While this might seem insignificant, it represents a significant percentage of the total weight and hints at the sturdier construction of the pro-grade unit.
To put their durability to the test, we pressurize both tanks until one fails. Despite exceeding their rated pressure, the pro-grade unit fails first, but in a controlled manner, with a weld seam cracking. On the other hand, the box store unit swells and eventually pops, indicating a potentially more dangerous failure mode due to the compromised glass lining.
Overall, this experiment highlights the importance of choosing a quality water heater, as the differences in construction can significantly impact performance and longevity. While box store units may offer cost savings upfront, the potential for early failure and safety concerns make professional-grade units a more reliable choice for long-term use.
If you're interested in learning more about the differences between these water heaters, including a detailed examination of their components and failure modes, watch the full video for a comprehensive analysis.
As always, thanks for watching! We aim to bring you plumbing videos in a way you’ve never seen before.
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