Keeping your water heater clean isn’t just a good idea for your health, it’s one of the smartest ways to extend the life of your system and keep your energy bills down. Here’s 3 reasons why you should flush your water heater and some DIY plumbing pro tips for how to do it right:
3 Big Reasons to Flush Your Water Heater
1. Stop Sediment Buildup Before It Causes Damage
Over time, minerals like calcium and magnesium from hard water settle at the bottom of your tank. This creates a thick layer of sediment that:
- Makes your water heater work harder
- Reduces available hot water
- Causes overheating and burnout of heating elements
2. Boost Efficiency and Heat Recovery Time
When your water heater is clean, it heats faster and runs smoother. Flushing the tank helps restore normal pressure and temperature so you’re not waiting forever for hot water.
3. Avoid Early Breakdowns and Costly Repairs
Sediment can lead to popping noises, clogged lines, rust, and internal tank corrosion. Flushing removes these risks before they turn into expensive service calls or a full system replacement.
How To Flush Your Water Heater with Step-By-Step Tips
Recommended at least once per year, or twice a year if you have hard water in your area.
Step 1: Turn Off the Power or Gas
- Electric heater? Switch off the breaker at your panel
- Gas heater? Set the thermostat to “Pilot” or turn off the gas valve
Step 2: Shut Off the Cold Water Supply
This stops more water from entering the tank while you’re draining it.
Step 3: Attach a Garden Hose to the Drain Valve
- Connect the hose to the valve near the bottom of your tank
- Run the hose outside or into a floor drain or sump pit
- Be careful—hot water can scald
Step 4: Open the Drain Valve and a Hot Water Faucet
- Open the drain valve to begin flushing
- Open one hot water faucet in your home (like the tub or sink) to help release pressure and allow the tank to drain faster
Step 5: Let It Fully Drain
Allow all the water and sediment to flush out. You may notice cloudy or rusty water at first. Keep draining until the water runs clear.
Step 6: Close the Drain and Refill the Tank
- Shut the drain valve and remove the hose
- Turn the cold water supply back on
- Leave the hot water faucet open until it runs smoothly again (this helps bleed air out of the lines)
Step 7: Restore Power or Gas
- Flip the breaker back on (electric) or turn the gas valve back to “On”
- Wait about 30 to 60 minutes for the water to fully heat up
Extra Pro Tips
- Watch for leaks around fittings when refilling
- If your tank hasn’t been flushed in several years, sediment may clog the valve—don’t force it open
- For older systems or tanks with stuck valves, call a pro plumber to avoid damaging the unit
- If you’re not sure what type of water heater you have (Bradford White, A.O. Smith, Rheem), check the label near the top of the tank
Not Comfortable Doing This Yourself?
No problem! PipeWrench Plumbing specializes in water heater maintenance and flushing for homeowners across the Portland metro area. We handle the hot and smelly jobs, so you don’t have to.
✅ Licensed, Bonded, Insured in Oregon
✅ Veteran-Owned and Operated
✅ Servicing all brands including Bradford White and A.O. Smith
Call us today to schedule your water heater flush or full inspection
Get peace of mind and hot water that flows like new.
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