The Gross Truth About What Builds Up in Your Neglected Water Heater

Flushing your water heater is an often-overlooked maintenance task that can help extend its lifespan and improve efficiency. Water heaters typically go unnoticed until they fail, but regular flushing can prevent issues and save you from costly repairs or replacements.

With a national average of $3,500 to install a new water heater, taking the time to maintain yours is well worth the effort. Keep reading to learn why flushing your water heater is so important — and what happens if you don’t — with tips from Michelle Law of Blue Frog Plumbing and Drain.

What Does Flushing Your Water Heater Do?

The primary purpose of flushing your water heater is to remove any sediment or mineral buildup that has accumulated over time. Most of the impurities in the water are collected by the anode rod, a metal rod inside the tank, to spare the water heater from corrosion. However, “some sediment still makes its way to the bottom of the tank, and flushing it clears the rest out,” Law says.

What Happens If You Don’t Flush Your Water Heater?

Neglecting to flush your water heater regularly can lead to sediment and sludge buildup at the bottom of the tank. This TikTok video by @plumbersplunger shows just how much debris can accumulate in an unflushed water heater, which can cause the tank to corrode, leak and fail prematurely. “The debris will actually begin to eat away at the tank,” Law says.

@theplumbersplunger Cutting open a water heater tank to see what is on the inside. Talking about water filtration and how to find out what is in your water. #plumbing #water #fyp ♬ original sound – The Plumbers Plunger

Sediment can also coat the heating element, reducing its efficiency and potentially causing it to overheat. Law notes that this issue may not occur with all water heaters and will depend on how the heating element is designed.

Law also points out that if you’ve never flushed your water heater—or haven’t done so in the last two years—now may not be the best time to start.

“The sediment has been sitting at the bottom of the tank, helping to seal any corrosion or small holes,” she explains. “Disturbing it can dislodge that buildup, potentially causing leaks.”

Can Not Flushing Your Water Heater Be Dangerous?

While neglecting to flush your water heater can cause problems, it’s not dangerous. Law points out that if it were, most of us would be in trouble. “The reality is, most people don’t flush their water heater. It’s just one of those maintenance tasks that doesn’t get done,” she says.

Other Important Water Heater Maintenance

Perform these tasks annually:

• Check the temperature setting: It should be between 120 and 130 degrees to prevent scalding and improve efficiency.
• Look for leaks: Check the floor around the water heater for any wet areas or puddles.

Consider having these maintenance tasks performed by a pro:

• Inspect the anode rod: “The anode rod is the sacrificial element in a water heater,” Law says, “It will corrode and needs to be replaced periodically.”
• Check the venting system: Gas water heaters produce carbon monoxide, a dangerous gas that must be properly vented to the outside. Regularly inspect that the vent pipe remains clear and unobstructed.
• Test the pressure valve: This pressure relief valve can become clogged or stuck over time. Check it regularly to ensure it opens when needed.

About the Expert

• Michelle Law is an apprentice plumber at Blue Frog Plumbing and Drain, a full-service residential and commercial plumbing company in Springfield, Massachusetts.

Source

USA Today: How Much Does Water Heater Installation Cost? 2024 Guide. (2024)