How much does it cost to flush a water heater and replace the anode rod?

Author: Taylor Grady  |  Last update: Monday, December 29, 2025

Anode Rod Replacement: While an anode rod costs between $20 and $50, a plumber can replace it for $50 to $150. The job typically takes about an hour. The anode rod protects the tank from corrosive materials and needs to be changed every few years. Water Heater Tank Flush: A water heater flush kit can cost around $150.

How much does a plumber charge to replace an anode rod?

You'll spend between $20 and $50 on the rod. If you choose to hire a water heater pro to get the job done, an anode rod replacement will cost you between $200 and $300. If you're not sure whether to handle this repair yourself, first examine your water heater.

How much do plumbers charge to flush a water heater?

The national average cost to flush a water heater is $160, but prices can vary in increments based on the tank size. A 30-gallon tank will cost between $90 and $120 on average, while a 70-gallon tank could cost anywhere between $180 and $250.

Is it worth replacing the anode rod in a water heater?

The anode rod is a very important factor in tank life and should only be removed for inspection or draining. Replacement of the anode rod is recommended when consumption or weight loss is greater than 75%. With regular inspection and replacement of anode rod, tank life can be greatly extended.

Do you have to drain a water heater to replace an anode rod?

Note: If your anode rod is on the top of the heater, you will only need to allow the tank to drain about a quart or 1/2 a gallon of water. If the anode is located on the side, drain the tank until the water is below the anode rod port.

How to Replace ANODE ROD on WATER HEATER: 2-Minute Tutorial Ep.11

What is the life expectancy of the anode rod in a hot water heater?

However, most professionals recommend inspecting the anode rod every one to three years and replacing it every four to five years. If your water supply has a high mineral content or if your water heater usage is heavy, these timelines may need to be shortened.

How to tell if an anode rod is bad?

If you notice signs of poor performance, such as discolored or rusty water, sulfuric or rotten egg smells, popping sounds from the tank, or high heating bills, inspect your water rod to determine if it needs replacement.

How often should you flush your water heater?

Should you drain your hot water heater every year? Yes, but that's really just the bare minimum. You should really drain and flush your water heater twice-per-year: once in the spring, and then again in the fall. The reason why comes back to what a water heater is flushing out: minerals and sediment.

Should I replace a 10 year old water heater?

If you suspect your water heater is more than 10 years old—it is time to consider replacing it before you're left with an emergency decision. To determine the age of your water heater, you'll need to identify the Brand Name and Serial Number for your unit.

Can you run a hot water heater without an anode rod?

Without a functioning anode rod, the tank itself would start to corrode, leading to leaks and system failure. This is why the condition of the anode rod is often a good indicator of the overall health of the water heater.

Can I flush my hot water heater myself?

You can flush your water heater yourself if it's done on a regular basis. This guide will take you through the steps to drain and flush a gas or electric water heater. Learning how to clean a water heater is an essential part of maintaining your plumbing system.

How much does it cost to remove and replace a 50 gallon water heater?

The average cost to replace a 50-gallon water heater is $700 to $1,800 for an electric unit or $1,000 to $3,100+ for a gas unit, including labor. A 50-gallon water heater costs $500 to $2,100 for the unit alone, depending on the fuel type, energy efficiency, features, and brand.

How much does a flush of water cost?

Using those figures, a 1.6 gallon toilet would cost roughly 1.3 cents per flush. WaterSense toilets would come in at about a penny, while older toilets, consuming 3.5 gallons per flush, cost 2.8 cents, Galeotafiore said.

How much does it cost to flush a hot water heater?

Expect a pro to charge you between $75 and $200 to come to your home to flush your water heater, depending on where you live. While this cost deters many homeowners from performing this annual maintenance, it can extend the water heater's lifespan by years, making it worth the additional cost.

How much does a water heater anode rod cost?

Anode Rod Replacement: While an anode rod costs between $20 and $50, a plumber can replace it for $50 to $150. The job typically takes about an hour. The anode rod protects the tank from corrosive materials and needs to be changed every few years. Water Heater Tank Flush: A water heater flush kit can cost around $150.

What is the life expectancy of a water heater?

While today's water heaters are better designed than older models, they still require regular maintenance in order to prolong their lives. With regular inspection, draining, and flushing, you can expect a gas water heater to last anywhere from 8-12 years and an electric water heater to last anywhere from 10-15 years.

Should I flush a 15 year old water heater?

If neither you nor a professional have flushed your water within the last five years, Water Heaters Now recommends not flushing it yourself.

Can a tank water heater last 20 years?

The life expectancy of a hot water tank varies depending on its size, how often it is used, and how well it is maintained. A standard 40-gallon tank will last between 10 and 15 years while larger tanks (50 gallons) have a lifespan of up to 20 years.

What happens if you never flush your water heater?

Over time, the number of sediment increases, leading to problems with the water heater. Sediment can begin the process of corrosion and can clog the valves inside the water heater tank, leading to leaks and other issues. Both of these problems decrease efficiency and can result in costly repairs.

Is it better to flush or drain water heater?

It is recommended that you flush your water heater at least once per year. Doing so will help to prevent the potential problems that sediment can bring over time. Typically, it takes one to two hours to flush a water heater. The size of your tank will impact the amount of time it takes to drain.

How often should I replace my anode rod?

In most cases, we recommend inspecting and potentially replacing the anode rod every 3 to 5 years. However, certain water conditions may accelerate the corrosion process, requiring more frequent replacements.

How can you tell if an anode rod is magnesium or aluminum?

To identify which anode rode you have simply look at the face of the brass nut on the anode, if you see an “A” stamped into the front of the brass nut you have an aluminum anode, if the face of the nut is blank you have a magnesium anode.

Is it too late to replace anode rod?

Your sacrificial anode may last longer, but if it's been more than 5 years since a human being even set eyes on it then you're long overdue for an inspection. That's because, in some cases in particularly mineral-rich water, the anode rod will last less than a single year – although 3-5 years of life is about average.

What does a bad anode rod smell like?

This bacteria can produce hydrogen sulfide gas, which has a distinctive "rotten egg" smell. In some cases, the anode rod can also become clogged with minerals and other debris, which can further contribute to the problem.

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