Rusty Water From Your Faucet? Your Water Heater May Be to Blame

 

Seeing rusty or discolored water coming out of your faucet can be alarming and unpleasant. While there are several possible causes for this problem, one of the most common is your water heater. If rust only appears when you use hot water, it's a strong sign that your water heater may be the cause of the problem.

Why Does Rust Form in Hot Water?

Water heaters, especially those with a storage tank, are made of metal and are constantly exposed to water. Over time, this combination can lead to corrosion inside the tank. To combat this problem, most water heaters come with an anode, a metal rod designed to attract corrosive elements and delay the formation of rust. However, as the anode wears out (usually after 3-5 years), corrosion can begin to affect the inside of the tank itself. This is when rust may begin to appear in your hot water.

How to Tell if Your Water Heater Is the Problem

A simple test can help you narrow down the cause. Run both cold and hot water from several faucets in your home. If rust only appears when using hot water, the likely cause is your water heater. If both your hot and cold water are rusted, the problem could be in your home's plumbing or even your municipal water supply. In older homes, galvanized iron pipes can also be a source of rust, especially if they are corroded from the inside.

Dangers of Ignoring Rusty Hot Water

Rusty water is more than just unsightly: It can stain sinks, tubs, and laundry, and it can have a metallic odor or an unpleasant taste. More importantly, if the rust is coming from your water heater, it can be a warning sign of serious internal deterioration. If left untreated, corrosion can lead to leaks or even a ruptured tank, causing water damage and requiring emergency plumbing repairs.

What You Can Do

If you suspect your water heater is the culprit, it’s time to call a qualified plumber. A professional can inspect the tank, check the condition of the anode, and determine whether repairs or a complete replacement are needed. In some cases, simply replacing a worn anode can extend the life of your water heater. However, if the tank itself is rusting, it’s usually more cost-effective and safe to replace the entire unit.

Preventing Rust in the Future

Routine maintenance is key to extending the life of your water heater. Flushing your tank once or twice a year helps remove sediment buildup that can accelerate rust formation. Regularly checking and replacing the anode can also prevent corrosion before it affects your tank. For those living in areas with hard or mineral-rich water, installing a water softener can also reduce the risk of corrosion.

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