When was the last time you gave your water heater some TLC? If you’re like most East Tennessee homeowners, it’s probably been a while. But ignoring your water heater could lead to lukewarm showers, high utility bills, or even a plumbing emergency—none of which are welcome in the middle of a busy day or a chilly morning.

Whether you have a traditional tank system or a modern tankless unit, regular water heater maintenance can extend its life, boost efficiency, and save you money. In this guide, we’ll walk you through the most important water heater maintenance tips tailored specifically for East Tennessee homeowners, who face unique climate challenges, seasonal fluctuations, and water quality considerations.

Why Water Heater Maintenance Matters in East Tennessee

East Tennessee’s climate features hot summers, cold winters, and fluctuating humidity levels. These shifts can place strain on plumbing systems—especially water heaters. Combine that with hard water commonly found in the region, and your water heater is at greater risk for sediment buildup, corrosion, and inefficiency.

Regular water heater maintenance helps you:

  • Prevent premature breakdowns
  • Improve heating efficiency
  • Avoid emergency plumbing calls
  • Extend the life of the unit
  • Keep your utility bills in check

Whether you live in Knoxville, Maryville, Alcoa, Sevierville, or surrounding areas, these tips can keep your water heater running smoothly year-round.

1. Flush the Tank Annually

Sediment buildup is one of the leading causes of water heater failure—especially in areas like East TN with moderately hard water. Minerals like calcium and magnesium settle at the bottom of the tank, insulating the heating element and making your system work harder than necessary.

How to flush your water heater:

  • Turn off the power (electricity or gas).
  • Shut off the cold-water supply valve.
  • Attach a hose to the drain valve at the bottom of the tank.
  • Open the drain valve and let the water and sediment flow into a drain or bucket.
  • After draining, turn the cold-water valve back on briefly to stir up remaining sediment and flush again.
  • Close the drain, remove the hose, and restart the system.

Pro tip: If you hear popping or rumbling noises from your tank, that’s a sign sediment buildup is getting severe—it’s time to flush ASAP.

2. Check the Anode Rod

Your water heater’s anode rod is a metal rod that attracts corrosion, preventing your tank from rusting. But over time, this rod deteriorates and needs replacing—typically every 3 to 5 years.

Signs your anode rod needs attention:

  • Rust-colored water
  • Rotten egg smell
  • Rapid corrosion on the tank

Have a plumber inspect the anode rod during your annual maintenance appointment. If it's worn down to less than half an inch in thickness or covered in calcium, it's time to replace it.

3. Test the Temperature and Pressure Relief Valve (T&P Valve)

The T&P valve is a critical safety component. It releases pressure if your tank gets too hot or builds up excessive pressure. A malfunctioning T&P valve can cause your water heater to explode—yes, literally.

To test the T&P valve:

  • Place a bucket under the discharge pipe.
  • Gently lift the valve’s lever; hot water should rush out.
  • If no water comes out or it continues to drip afterward, the valve should be replaced.

Testing it once a year is a quick step that could prevent a serious accident.

4. Lower the Temperature Setting

The default temperature on most water heaters is 140°F, but lowering it to 120°F is safer, more energy-efficient, and still hot enough for daily use.

Benefits of reducing the temperature:

  • Lowers energy costs
  • Reduces scalding risk
  • Slows mineral buildup and corrosion

You can usually adjust the thermostat via a dial on the side of the tank or a digital interface on a tankless model.

5. Insulate the Tank and Pipes

Older water heaters and exposed pipes can lose heat quickly, especially in East Tennessee’s colder months. Wrapping your tank and pipes in insulation helps reduce energy waste and keeps your water hotter longer.

What to insulate:

  • The tank: Use a water heater blanket for tanks 7 years or older.
  • The first 3 feet of both hot and cold pipes: Use foam pipe insulation.

Make sure not to cover the thermostat or top/bottom of a gas water heater.

6. Schedule Annual Professional Maintenance

Even the most diligent DIY homeowner can’t do everything. An annual inspection by a licensed plumber ensures your water heater is safe, efficient, and in good condition.

A typical professional tune-up includes:

  • Full flush of the tank
  • Anode rod inspection
  • T&P valve testing
  • Leak detection
  • Burner/element check
  • Efficiency optimization

At Advanced Heat, AC & Plumbing, we offer comprehensive water heater maintenance for homes across East Tennessee. Our team will help you catch problems before they turn into major expenses.

7. Know the Age of Your Unit

Water heaters don’t last forever. Most traditional tank models last 8–12 years, while tankless systems can last 15–20 years with proper maintenance.

How to check the age:

  • Look for the manufacturer’s label on the side of the unit.
  • The serial number typically contains the date code (e.g., "K07" might mean November 2007).

If your unit is nearing the end of its lifespan, you may want to consider proactive replacement rather than risk a breakdown during winter or while hosting guests.

8. Be Alert to Warning Signs

Stay alert to these red flags that may indicate your water heater needs service or replacement:

  • Inconsistent water temperature
  • Discolored or foul-smelling water
  • Loud banging or rumbling noises
  • Leaking around the base of the tank
  • Rising energy bills without explanation

Don’t wait until the problem worsens. The sooner you call a professional, the better your chances of a simple fix.

9. For Tankless Units: Flush and Descale Annually

Tankless water heaters are energy-efficient and compact, but they’re not maintenance-free. Hard water can cause scale buildup on the heat exchanger, reducing performance and lifespan.

Use a tankless water heater descaling kit annually or hire a professional to:

  • Disconnect the system
  • Flush with vinegar or a descaling solution
  • Rinse and reconnect safely

This service is especially important in East TN, where hard water is common in municipal and well systems.

10. Install a Leak Detection System

Smart leak detection systems monitor your plumbing for leaks and can even shut off your water if they detect a major issue. This can help you avoid catastrophic water damage and expensive repairs.

If your water heater is located in an attic or near finished spaces, a leak detection system is a wise investment.

Final Thoughts: Protect Your Home with Proper Maintenance

Your water heater works hard every day—don’t wait for a breakdown to give it the attention it deserves. Regular maintenance not only keeps your showers hot and your dishes clean but also protects your investment and your peace of mind.

At Advanced Heat, AC & Plumbing, we specialize in water heater maintenance, repair, and replacement across Knoxville, Maryville, Alcoa, and surrounding East Tennessee communities. Whether you need a quick flush, an anode rod replacement, or a whole new system, we’re here to help.

Schedule your water heater maintenance today and enjoy reliable hot water all year long—no surprises, no stress.