Water Heater Maintenance Checklist
Author: Your Local Plumber
December 31, 2025
Regular water heater maintenance helps extend the life of your system, improve energy efficiency, and prevent unexpected breakdowns. Whether you have a traditional tank water heater or a tankless system, following a simple maintenance checklist can save you money and help ensure you always have reliable hot water when you need it.
Check the Temperature Setting
Your water heater thermostat should typically be set to around 120 degrees Fahrenheit. This temperature is hot enough for daily use while helping prevent scalding and reducing energy consumption. If the temperature is set too high, it can put unnecessary strain on the system and shorten its lifespan.
Inspect for Leaks and Moisture
Take a few minutes to look around the base of your water heater and along visible pipes and connections. Any signs of moisture, pooling water, or corrosion could indicate a leak that needs attention. Catching small leaks early can help prevent water damage and costly repairs.
Listen for Unusual Noises
Popping, rumbling, or banging noises coming from your water heater can be a sign of sediment buildup inside the tank. Sediment reduces efficiency and can cause overheating. If you notice unusual sounds, it may be time to flush the tank or call a professional for service.
Test the Pressure Relief Valve
The temperature and pressure relief valve is a critical safety component. Carefully lift the valve handle and let it snap back into place. You should hear a brief rush of water. If no water comes out or the valve continues to drip afterward, it may need to be replaced by a licensed plumber.
Flush the Tank Annually
For tank-style water heaters, flushing the tank once a year helps remove sediment buildup that settles at the bottom. Sediment can reduce heating efficiency and lead to premature failure. Always turn off power or gas before flushing, and follow manufacturer guidelines or hire a professional if you are unsure.
Check the Anode Rod
The anode rod helps prevent rust inside the tank by attracting corrosive elements. Over time, the rod wears down and becomes less effective. Checking and replacing the anode rod every few years can significantly extend the life of your water heater.
Inspect Venting and Airflow
Gas water heaters require proper venting to safely remove exhaust gases. Make sure vent pipes are securely connected and free of obstructions. Blocked or damaged venting can be dangerous and should be addressed immediately.
Keep the Area Around the Water Heater Clear
Maintain clear space around your water heater to allow proper airflow and easy access for maintenance. Avoid storing flammable materials, boxes, or cleaning supplies nearby, especially around gas-powered units.
Tankless Water Heater Maintenance Tips
Tankless water heaters require regular descaling to remove mineral buildup, especially in areas with hard water. Most manufacturers recommend descaling once a year. Skipping this step can reduce efficiency and cause internal damage over time.
Know When to Call a Professional
If your water heater is more than 8 to 12 years old, showing signs of rust, producing inconsistent hot water, or leaking, it may be time for professional service or replacement. A licensed plumber can inspect your system, perform maintenance safely, and recommend the best options for your home.
Protect Your Home With Routine Water Heater Maintenance
Following a regular water heater maintenance checklist helps homeowners avoid unexpected cold showers, water damage, and emergency repairs. A little preventive care goes a long way toward keeping your system running efficiently and reliably year-round.
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