One troubled homeowner shared pictures of his water heater that looks like it's about to pop at any moment with the ominous title: "How dangerous was this hot water heater?"
Online commenters were alarmed by the photos shared. It appeared badly warped and rusted out.
For households already facing a replacement, that kind of situation can also open the door to lower future utility costs. Upgrading from an older electric-resistance model to a heat pump water heater can often reduce energy bills.
Here's what to know
After turning off both the gas and water supply, the homeowner asked for advice in a post on Reddit, writing, "already shut off the gas and the water supply. How dangerous was this?" The attached images showed a severely deformed water heater that commenters said looked dangerously close to failing.
One commenter summed up the reaction bluntly: "Whoa. I'd say it was about to pop like a very expensive balloon."
Another commenter raised a key safety concern: "Is there a pressure relief valve? Wondering if it's capped." Water heaters are built to hold hot, pressurized water, and relief valves are one of the main protections against dangerous pressure buildup.
A visibly bulging tank is not just a cosmetic problem. It can point to a serious internal failure that may lead to leaks, flooding, or worse.
More background
Water heaters are usually tucked away out of sight, making it easy for problems to go unnoticed until they become severe. But warping, bulging, leaks near the base, rust around fittings, or unusual noises can all signal that a unit needs immediate attention.
Save $10,000 on solar panels without even sharing your phone number Want to go solar but not sure who to trust? EnergySage has your back with free and transparent quotes from fully vetted providers in your area. To get started, just answer a few questions about your home — no phone number required. Within a day or two, EnergySage will email you the best options for your needs, and their expert advisers can help you compare quotes and pick a winner. Solar panels can save you more than $50k over their 25-year lifespan, and EnergySage can help you save as much as $10k on installation. Which begs the question — isn't that worth an email or two? |
People in the thread also pointed to shutdown steps that depend on the type of unit: Electric heaters can be turned off at the breaker, while gas models should have the gas supply shut off. Because the original poster had already cut off the gas and water, those steps likely reduced the immediate danger.
A failing water heater can quickly become both a safety threat and a financial burden. Beyond the risk of a ruptured tank, even a unit that is still limping along can waste energy, raise monthly bills, and leave a household scrambling for an emergency replacement.
What can be done?
If a water heater looks swollen, warped, or otherwise misshapen, the safest move is to stop using it and contact a licensed plumber immediately. A professional can determine whether the issue is pressure-related, structural, or tied to a failed safety component.
For homeowners weighing replacement options, Cala makes smart heat pump water heaters that focus on both efficiency and control. Its customizable smart heat pump water heaters help homeowners decrease their energy bills by heating water exactly when it's needed. Because they are designed around household demand rather than constantly maintaining excess hot water, they can reduce waste and make utility costs more predictable.
Homeowners comparing long-term operating costs may want to look at how Cala pairs heat pump efficiency with a more tailored approach to hot water use.
One commenter put the situation into perspective: "Could very well turn into a perfect reenactment of the mythbusters water heater rocket episode."
Get TCD's free newsletters for easy tips, smart advice, and a chance to earn $5,000 toward home upgrades. To see more stories like this one, change your Google preferences here.
