Flush Frequency Guide: How Often Should You Flush Your Water Heater?

Flush Frequency: How Often Should You Flush Your Water Heater?

Got a water heater that’s getting sluggish or making weird noises? Chances are it’s time for a flush. Sediment builds up over the months, and a regular flush keeps the tank efficient and the water hot. In this guide we’ll tell you how often to flush, what signs to watch for, and a quick step‑by‑step method you can do yourself.

Why Flush Frequency Matters

Every time you use hot water, minerals from the supply water settle at the bottom of the tank. After a while that layer turns into a crust that blocks heat transfer. The result? Higher energy bills, longer recovery times, and a shorter tank lifespan. Flushing removes that crust, restores performance, and can save you a few pounds on your next energy bill.

How Often Should You Flush?

There’s no one‑size‑fits‑all answer, but a good rule of thumb is twice a year for most homes. If you have hard water (lots of calcium and magnesium) you might need to flush every 4‑6 months. On the other hand, if you live in an area with soft water, an annual flush could be enough. Keep an eye on these clues:

Hot water taking longer to heat up

Rumbling or popping sounds from the tank

Visible sediment at the bottom when you open the drain valve

Higher than usual energy usage

Now that you know the timing, let’s walk through the actual process. You’ll need a garden hose, a bucket, and a wrench. Turn off the power or gas supply, connect the hose to the drain valve, open the valve, and let the water run until it’s clear. Then close the valve, refill the tank, and turn the power back on. It’s that simple.

Still not comfortable doing it yourself? A quick call to a local repair service can save you a couple of minutes and give you peace of mind. Many technicians will include a flush as part of a routine maintenance visit, which is a great way to stay on top of your water heater’s health without lifting a finger.

Bottom line: regular flushing is cheap, quick, and extends the life of a major household appliance. Set a reminder in your calendar – every spring and autumn for average water, or every six months if your water is hard. You’ll notice the difference in hotter showers and a lower energy bill. Keep your water heater happy, and it’ll keep you warm.

27 Apr 2025
Gideon Thornton
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How Often Should I Flush My Water Heater? Your Simple Guide to a Longer-Lasting Tank

Wondering how often you really need to flush your water heater? This practical guide explains why flushing matters, how often you should do it, and what signs point to a tank that needs attention. Save yourself money, avoid cold showers, and keep your water heater in top shape with simple, effective tips. No jargon, just the facts. Learn the clear steps to a longer-lasting hot water tank.