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.
You don't really need to drain the tank to flush it out. Turn off the heating elements and attach a hose to the drain valve tap. Run the hose to a drain or outside. (You could use the water for your lawn or garden) Open the drain valve until the water runs cold. Close the valve and repower the heater.
An important part of your water heater, it moves cold replacement water to the bottom of the tank when you use hot water; otherwise, both will mix and reduce the water temperature. Anode Rod Replacement: While an anode rod costs between $20 and $50, a plumber can replace it for $50 to $150.
Poor water heater performance can sometimes stem from an anode rod that's overdue for replacement. 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.
In other words, it “sacrifices” itself to extend the life of the water heater. Most water heater manufacturers will recommend inspecting the condition of the sacrificial anode every one (1) to three (3) years and replacing it when it has been consumed more than 50%.
In any case, water heater anode rods are essential for protecting your tank from corrosion, but they eventually wear out after around 3-5 years, depending on many factors including the hardness or softness of your water.
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.
Most often, there will be a flexible connection from the hard plumbing to the anode's nipple. In this case, simply loosen the nut of the flex line attached to the nipple. You will then be able to remove this type of anode with a pipe wrench and replace the anode as described in the above instructions.
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.
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.
All water heaters have a minimum of one anode rod. Some water heaters have longer warranties because they have two anode rods. If there are two anode rods, that is because one is attached to a hex head at the top and the other is a combination anode attached to the hot water outlet.
For example, the average 40-gallon water heater installation cost runs between $1,000 and $2,500, while its 80-gallon counterpart runs between $2,650 and $3,910.
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.
Replacement is necessary if it appears heavily corroded or is less than half its original thickness. Rotten Egg Odor: A corroded anode rod can produce hydrogen sulfide gas, producing a foul odor resembling rotten eggs. If you notice such odors in your hot water, the anode rod may need replacement.
Most homeowners should flush their water heaters every 6 months or so, but if you have extremely hard water, you may want to do it more often. Flushing your hot water heater could be necessary as often as every few months depending on the mineral content of your local water supply.
The composition of aluminum anode rods for water heaters ensures they last longer and are more resistant to the harsh conditions inside the tank.
Your water heater consists of a number of intricate parts that all must be maintained to ensure your system is working properly and efficiently. Anode rods, screw and bolt elements, drain valves — these are just a sampling of the water heater parts you'll find at Lowe's.
Aluminum anodes are lighter, cheaper, and more eco-friendly, but they need regular cleaning to avoid passivation. Zinc anodes are heavier, more expensive, and more toxic, but they are more reliable in salt water.
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.
To replace the water heater anode rod, you only need to drain about a gallon of water, but this is a good opportunity to flush the water heater tank.
To remove almost all anode rods, you'll need a 1 and 1/16 inch deep socket, and a strong ratchet, maybe even using a additional breaker bar to give your more leverage, although there is an easier way. Use an impact driver with the deep socket.
Most anode rods are sacrificial, meaning they are designed to corrode (instead of your water heater lining). Because they are meant to break down, they wear out every few years and need to be replaced. Tankless water heaters don't have anode rods, but all standard tank-style water heaters do.
Over time, the metal in the anode rod will corrode away itself, leaving only a protective coating around the metal walls and bottom of your hot water tank.
If you are having some air in a hot water line without any other signs of corrosion, this can be caused by the reaction between the anode installed inside your tank and your water itself. The anode rod creates some hydrogen because of the water and this creates some bubbles in the water.
Water softeners reduce the hard minerals in your water, which can help your water heater last longer. By removing these minerals before they get into the tank, the anode rod doesn't have to work as hard, and there's less mineral buildup on the tank floor.