If you’ve ever wondered how often to flush your water heater, you’re not alone. Many homeowners don’t realize that flushing your water heater regularly is one of the simplest ways to improve efficiency, extend its life, and save money on energy bills. In this guide, we’ll explain why it’s important, how often you should do it, and what could happen if you skip this crucial HVAC maintenance step.
Why Flushing Your Water Heater Matters
Over time, minerals like calcium and magnesium in your water supply settle at the bottom of your water heater. This sediment buildup creates a layer of insulation that makes your heater work harder to heat the water. As a result, your water heater uses more energy, heats less efficiently, and wears out faster.
By flushing your water heater regularly, you:
- Improve energy efficiency
- Prevent damage and corrosion
- Maintain consistent water temperature
- Extend the lifespan of your water heater
- Avoid costly repairs or early replacement
So, How Often Should You Flush Your Water Heater?
Experts recommend flushing your water heater at least once a year.
However, the ideal frequency depends on a few factors:
1. Water Quality
If you live in an area with hard water, you may need to flush your heater every 6 months. Hard water has a higher mineral content, which leads to faster sediment buildup.
2. Type of Water Heater
- Tank water heaters should be flushed yearly to remove sediment.
- Tankless water heaters also benefit from descaling once a year, especially in areas with hard water.
3. Usage Level
Homes with larger families or high water usage might need more frequent flushing compared to smaller households.
Signs Your Water Heater Needs Flushing
If you’re unsure whether it’s time to flush your unit, look out for these warning signs:
- Rumbling or popping sounds – caused by boiling water under sediment
- Slow hot water supply or low water pressure
- Fluctuating water temperatures
- Discolored or rusty water
- High energy bills
Ignoring these signs can lead to leaks, overheating, or even total heater failure.
Can You Flush It Yourself?
Yes! If you’re comfortable with DIY tasks, flushing your water heater is something you can do on your own. But if you’re unsure, it’s always safe to call an HVAC professional. Here’s a quick overview of the process:
- Turn off the power or gas to the water heater.
- Turn off the cold water supply.
- Connect a garden hose to the drain valve and place the other end in a safe drainage spot.
- Open the drain valve and let the water (and sediment) flow out.
- Close the valve, remove the hose, turn the water back on, and restore power.
Note: Be careful—the water can be very hot.
Get Professional Help for Peace of Mind
While DIY is an option, many homeowners prefer to have their HVAC professionals handle water heater flushing. It’s quick, affordable, and ensures everything is done right.
If you’re not sure when your last flush was or if your system is showing signs of trouble, it’s a good idea to schedule a maintenance check. Our experienced HVAC team can help flush, inspect, and keep your water heater in top shape.
Final Thoughts
Flushing your water heater isn’t just good maintenance—it’s a smart move that saves energy, protects your home, and extends your system’s life. If you’ve been putting it off, now is the time to act.