Water Heater Maintenance Tips
To maintain your water heater, you should flush the tank annually to remove sediment, check the anode rod every three years, and test the temperature and pressure relief (TPR) valve every six months. This prevents corrosion and improves efficiency.
Test the TPR Valve
The Temperature and Pressure Relief (TPR) valve prevents your tank from exploding if pressure gets too high. Testing it ensures it isn't stuck shut.
- Place a bucket under the discharge pipe connected to the valve.
- Lift the lever on the valve slightly to let water flow out for 3 seconds.
- If no water comes out, or if it doesn't stop dripping after you let go, replace the valve immediately.
Flush the Tank Annually
Minerals and debris settle at the bottom of the tank, reducing efficiency and accelerating corrosion. Flushing removes this damaging sludge.
- Turn off the power or gas supply to the water heater.
- Attach a garden hose to the drain valve at the bottom of the tank.
- Open the drain valve and let the water flow outside until it runs completely clear.
Check the Anode Rod
The anode rod is a sacrificial metal rod that attracts corrosive elements in the water so they destroy the rod instead of the tank lining.
- Locate the hex head on top of the water heater and use a socket wrench to unscrew it.
- Pull the rod out (watch your ceiling clearance).
- If the rod is coated in calcium or mostly exposed core wire, it must be replaced to protect the tank.
Insulate the Tank and Pipes
Adding insulation reduces heat loss, saving money on your energy bill and reducing the workload on the heating elements.
- Wrap the hot water pipes extending from the tank with foam pipe insulation.
- If your tank is in a cold garage or basement, consider a fiberglass insulation blanket.
- Never cover the top of a gas water heater or block the burner compartment.
When to Call a Professional
Call a plumber if the TPR valve is leaking continuously, or if the drain valve clogs completely while you are trying to flush the tank.
What a Plumber Will Do
A plumber can perform comprehensive annual maintenance, replace failing anode rods, swap out faulty TPR valves, and inspect gas burners or heating elements.
Frequently Asked Questions
Do tankless water heaters need maintenance?
Yes, tankless units must be flushed annually with a descaling solution (like white vinegar) to remove mineral scale from the heat exchanger.
Can I change the anode rod myself?
Yes, if you have a socket wrench and enough ceiling clearance, replacing an anode rod is a straightforward DIY task.
Why does my hot water run out so quickly?
Short hot water supply usually indicates a broken dip tube or excessive sediment buildup at the bottom of the tank.
How often should I check the TPR valve?
You should lift the lever to test the Temperature and Pressure Relief valve every 6 months to ensure it opens and closes freely.