5 Common Myths About Water Heaters—Debunked!

Water heaters can feel like a mystery, right? Are tankless systems always better? Do you really need to flush your tank regularly? With all the conflicting advice out there—from neighbors, online searches, and big-box stores—it’s no wonder homeowners feel confused. 

Today, we’re cutting through the noise and setting the record straight on some of the most common water heater myths. 

Myth #1: “Tankless Water Heaters Are Always Better” 

Reality check: While tankless water heaters are energy-efficient and space-saving, they’re not ideal for every home. 

• What to know: Tankless systems provide endless hot water, but they’re more expensive upfront and can be less effective with high simultaneous water demand. Traditional tanks are budget-friendly upfront but may consume more energy over time. 

A small household will benefit from a tankless system, but a family of five taking morning showers at the same time may experience inconsistent water temperatures. 

Myth #2: “You Don’t Need to Maintain a Water Heater” 

Reality check: Like any other appliance, water heaters need regular care to function efficiently and last longer. 

• What to know: Flushing your water heater helps remove sediment buildup, which can lead to inefficiency and a shorter appliance lifespan. 

Homeowners in areas like Southern California with hard water are especially prone to sediment issues, making maintenance even more critical. 

Pro tip: Add water heater flushing to your annual home maintenance checklist. 

Myth #3: “Bigger Tanks Mean Better Performance” 

Reality check: The size of your water heater should match your household’s needs—not bigger for the sake of bigger. 

• What to know: An oversized tank wastes energy, while an undersized tank can run out of hot water when you need it the most. 

A two-person condo may only need a 30-gallon tank, while a family of six might require an 80-gallon system. Choosing the right size saves energy and keeps everyone happy. 

Myth #4: “Water Heaters Last Forever” 

Reality check: No water heater lasts forever, even with proper care. 

• What to know: The average lifespan of a tank water heater is 8–12 years, while tankless models can last 15–20 years with consistent maintenance. 

Replacing your water heater near the end of its lifecycle prevents unexpected breakdowns, costly repairs, or even water damage from leaks.  

Mark your calendar for regular inspections, so you’re never caught off guard. 

Myth #5: “You Can Install or Repair a Water Heater Yourself” 

Reality check: DIY water heater installation or repairs might seem simple, but they can lead to safety risks and costly mistakes. 

• What to know: Professional installation ensures proper venting, pressure relief valves, and compliance with local building codes. 

A DIY installation gone wrong can void your warranty or cause dangerous flooding, carbon monoxide leaks, and leave you with expensive repairs. 

Save yourself the headache and call in the experts from the start. 

Make the Right Choice for Your Home 

At THE Water Heater Company, we know that every home is unique. That’s why we don’t push one-size-fits-all solutions. Instead, we focus on educating homeowners, evaluating your specific needs, and guiding you to the best water heater choice for your home and budget. 

Understanding these common myths can help you avoid costly mistakes and get the most from your water heater. If you’re not sure what’s right for your home, don’t wait until there’s an issue. 

Call THE Water Heater Company at (877) 798-7487 today for expert advice and professional service. You deserve a water heater that keeps your home running smoothly.