When Corrosion Signals a Bigger Problem
Corrosion on top of a water heater isn't just cosmetic — it's often a sign that the tank's integrity is compromised. We recently helped a Gilbert homeowner whose gas water heater had severe corrosion on top of the unit, a clear indication that replacement was the safer path forward.
What We Found
The corrosion had developed around the top of the tank, likely starting near fittings and connections where moisture can collect and gradually eat away at the metal over time. With a gas water heater, corrosion near the top of the unit is worth taking especially seriously, since it's close to the venting and gas connections that need to stay in good condition for the unit to operate safely.
How We Fixed It
After assessing the damage, our team determined the unit needed to be replaced rather than repaired, and installed a new gas water heater in its place. This eliminated the risk of a sudden leak or tank failure and gave the homeowner a fresh start with a reliable unit. This is a similar situation to a gas water heater we serviced in Avondale, where corroded components around the connections were also the root cause of the problem.
Why Gas Water Heaters Corrode Over Time
Arizona's hard water, often 15 or more grains per gallon (GPG), plays a significant role in accelerating corrosion on water heaters throughout the Valley. Mineral deposits build up around fittings and inside the tank, creating conditions that speed up rust formation, especially in older units or those that haven't had regular maintenance. A water treatment system can help reduce this mineral buildup and extend the life of a new water heater going forward.
Signs Your Gas Water Heater May Need Attention
Visible rust or corrosion on top of or around the unit
A rotten egg or sulfur-like smell near the water heater
Rusty or discolored hot water
Inconsistent water temperatures
The pilot light or burner acting unusual
If you notice any of these signs, especially visible corrosion, it's worth having your water heater inspected right away. Corrosion tends to worsen quickly once it starts, and catching it early can prevent a leak or safety issue.
Honest, Upfront Service Every Time
At Mountain Vista Plumbing, we believe in transparent, upfront pricing before any work begins — no guesswork, no pressure. Whether it's a straightforward replacement or a more involved diagnosis, our team treats every home with the same care and respect. Take a look at more of our completed work on our recent projects page, or read what our customers have to say on our reviews page.
Serving Gilbert and the Greater East Valley
We proudly serve homeowners throughout Gilbert and our surrounding service cities, including Mesa, Chandler, Apache Junction, Queen Creek, San Tan Valley, and Gold Canyon. If you notice corrosion or other warning signs on your gas water heater, contact us for a fast, honest estimate.
