Have you ever turned on the hot water tap only to be greeted by a shocking sight – black water?
This unpleasant surprise can be caused by a few different things, and luckily, there are solutions!
In this post, I’ll go over the reasons why you get black water from hot water heaters and what you can do to stop it from happening.
Let’s take a quick look at the possible causes of this issue first:
Sediment buildup in a water heater tank is the most common reason why this happens.
As time goes by, minerals and other particles suspended in the water can settle at the bottom of the tank. This is especially true in areas with hard water, where the high mineral content makes it easier for these particles to accumulate.
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When you turn on the hot water tap, the flow of water can disturb this sediment buildup, causing it to get stirred up and enter your water supply.
This can result in black or dark-colored particles appearing in your water.
Another reason you see black water is because of a reaction in the anode rod.
This is a common issue in homes with soft water.
Your water heater has a magnesium anode rod that helps protect the tank from corrosion. This rod is like a superhero that sacrifices itself by attracting corrosion to protect the tank.
With soft water, the magnesium can react and create a black, flakey substance.
This is typically harmless, but can be unpleasant.
The inner lining of a water heater tank is crucial for preventing corrosion and maintaining tank integrity. However, in older units, this lining can deteriorate over time.
When the lining breaks down, the exposed metal can corrode and mix with the water, leading to discoloration and a black tint.
This deterioration is often noticeable in the water coming out of taps, indicating a problem with the tank lining.
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Many water heaters have rubber components like hoses and gaskets as part of the hot water supply system. Over time, these rubber parts can start to break down, especially when exposed to high temperatures or chemicals present in the water.
As the rubber deteriorates, it can release black particles that end up discoloring the water.
This discoloration is a clear sign that the rubber components are wearing out and need attention.
Now that you know what can cause the hot water from your faucet to come out with a black tint , here’s how to stop it:
If you’re dealing with black water, flushing your water heater tank is a good first step.
This helps remove sediment buildup that might be causing the issue.
To flush the tank, turn off the power or gas supply, then connect a hose to the drain valve at the bottom and run the water until it’s clear. Be careful, as the water will be hot.
Have a bucket ready to catch the water as it drains out. Once the tank is flushed and the water runs clear, you can close the drain valve and turn the power or gas back on.
This should get your water heater back to providing clean, clear hot water.
If your black water problem is due to a deteriorating anode rod, replacing it is the way to go.
This is a relatively simple task that you or a plumber can do. Get a new aluminum or powered anode rod, as they offer better protection and a longer lifespan compared to standard rods.
These upgraded rods are designed to resist corrosion more effectively, keeping your tank in top condition for an extended period.
If you suspect deteriorating rubber components are causing black particles in your water, inspect and consider replacing them.
Look for cracks, brittleness, or signs of wear in hoses, gaskets, and connections.
Replacing worn rubber parts is essential to prevent further water contamination.
Don’t ignore these issues as they can impact your water quality.
In some cases, the black water issue may be a sign that your water heater is nearing the end of its lifespan.
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If the tank lining is severely compromised or the unit is more than 10 years old, it may be more cost-effective to replace the entire water heater rather than attempting to repair it.
Other signs that it’s time for a new water heater are
Keeping your hot water heater in good shape is the easiest way to avoid black water!
You should clean it out by flushing the tank at least once a year to remove any built-up sediment that can cause problems.
If you live in an area with hard water, you can install a water softener or filter.
This acts like a shield and will significantly reduce the amount of minerals entering your tank.
FAQs
Yes, you can flush your water heater yourself. Here’s how:
Yes, you should turn off your hot water heater if it is leaking. For electric water heaters, locate the breaker and switch it off. Gas water heaters should have the gas shut off.
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