What does it cost to hire out "Flush your water heater"?

A fair national range is $120–$225; local labor costs move that number up or down by county.

Can I do "Flush your water heater" myself?

It's rated difficulty 2 of 5 and takes about 45 minutes. DIY this — it's genuinely a garden hose and a valve. Hire it only if the drain valve is stuck or plastic.

How often should this be done?

Annual, typically October. Local frost dates can shift the timing.

What should I ask before hiring someone for this?

Worth asking: Will you check the anode rod while you're in there, and what condition is it in? How much sediment came out? A photo is normal to ask for. What's the manufacture date on this tank?

How do I know I'm being upsold on this job?

Watch for: They recommend replacing a tank under 8 years old without showing you a leak or rusted fitting. A 'flush' that takes under 10 minutes — that's a rinse, not a flush. They quote a whole-house water treatment system during a $150 service call. Get a second opinion when: Any replacement quote over $2,000, or any 'it could burst any day' urgency on a tank that isn't leaking.

Water heater

Flush your water heater

Annual · typically October

Why it matters

Every water heater tank slowly collects sediment — minerals that drop out of the water and settle on the bottom.

That layer of sediment makes the burner work harder, adds a rumbling sound as it ages, and is the single biggest reason tanks die at year 8 instead of year 14.

What skipping it costs

$800–$1,800

Sediment builds a crust on the bottom of the tank. The burner overheats the steel through it, the tank fails years early, and you're buying a $1,800 replacement instead of doing a 45-minute chore.

Two ways to get it done

Do it yourself

~45 min · difficulty 2 of 5

You'll need: Garden hose, Flathead screwdriver, Work gloves.

Turn the thermostat to "vacation" (gas) or flip the breaker (electric). Give it an hour to cool if you can.
Connect a garden hose to the drain valve at the bottom of the tank. Run it to a floor drain or outside.
Shut the cold-water inlet valve on top. Open a hot tap somewhere in the house to break the vacuum.
Open the drain valve and let it run until the water comes out clear — usually 10 to 20 minutes.
Briefly open the cold inlet a couple times to stir up and rinse out the last of the sediment.
Close the drain, pull the hose, reopen the cold inlet. When water runs steady from the open hot tap (no air spitting), close it and turn the heat back on.

Watch for: if the drain valve is plastic and won't open, don't force it — that's the moment this becomes a hire-out.

Hire it out

$120–$225National fair range — local labor moves this number.

A plumber's flush-and-inspect visit should run $120–$225 in your area, and a good one earns it — they'll also check the anode rod (the sacrificial part that rusts so your tank doesn't) and the temperature-pressure relief valve.

Ask the tech the questions below and expect straight answers. The anode rod is the honest upsell here: if it's genuinely eaten down to the wire, a $50 rod install buys the tank years. A whole-home water softener pitch during a flush visit is not.

Ask the tech

Will you check the anode rod while you're in there, and what condition is it in?
How much sediment came out? A photo is normal to ask for.
What's the manufacture date on this tank?

Red flags you're being upsold

They recommend replacing a tank under 8 years old without showing you a leak or rusted fitting.
A 'flush' that takes under 10 minutes — that's a rinse, not a flush.
They quote a whole-house water treatment system during a $150 service call.

Second opinion time: Any replacement quote over $2,000, or any 'it could burst any day' urgency on a tank that isn't leaking.

The call

DIY this — it's genuinely a garden hose and a valve. Hire it only if the drain valve is stuck or plastic.