How Long Does a Tankless Water Heater Last?

When homeowners in South Carolina consider upgrading to a tankless water heater, the initial installation cost is often the biggest hurdle. However, when you factor in the operational lifespan of the unit, a tankless system is actually one of the most cost-effective investments you can make for your home.

Traditional Tanks vs. Tankless Lifespans

A traditional storage-tank water heater holds 50 gallons of water 24/7. Because water is constantly sitting inside the steel tank, the tank inevitably rusts from the inside out. The average lifespan of a traditional tank is 8 to 12 years before it must be replaced.

A tankless water heater, on the other hand, does not store water. Water only passes through the copper or stainless steel heat exchanger when you open a hot water tap. Because it isn't constantly exposed to standing water, it doesn't rust. With proper maintenance, a high-quality tankless water heater can last 20 to 25 years. That is nearly double the lifespan of a traditional tank!

The One Requirement: Annual Descaling

Notice the phrase "with proper maintenance." This is the critical catch. While tankless units don't rust, they are highly susceptible to mineral scale. The hard water in Spartanburg & Greenville leaves behind calcium deposits inside the heat exchanger. If this scale builds up, it will cause the unit to overheat, warp, and fail prematurely.

To achieve that 20+ year lifespan, you must have your tankless water heater professionally flushed and descaled once a year. This simple, affordable maintenance step dissolves the minerals and restores the unit to factory efficiency.

Protect your investment. Call Pipedex Plumbing & Drains today at 864-900-0300 to schedule your annual tankless flush and ensure decades of endless hot water.