Tank vs. Tankless: Which Water Heater Needs More Maintenance in Tennessee?

Written By Ryan rodgers

If you’re deciding between a tanked or tankless water heater, or already own one, you might be wondering: which one requires more maintenance?

The answer might surprise you.

Tanked Water Heaters:

  • Store 40–80 gallons of hot water at all times

  • Sediment builds at the bottom over time

  • Need to be flushed at least once a year in areas like Nashville or Hendersonville, where water hardness is high

Tankless Water Heaters:

  • Heat water on demand—more efficient

  • But scale can quickly clog the narrow internal heat exchanger

  • Need descaling flush service annually

Bottom Line:

Both systems need flushing every 12 months.
But tankless units are less forgiving when it’s skipped. At FlowTech Tankless, we service both types with expert care and a simple $250 flat rate.

Ryan rodgers
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Is Nashville Hard Water Ruining Your Water Heater?