Green Residue in Sink: Causes and Solutions - Homemaking.com

What is the Green Residue in Your Sink?

What is the Green Residue in Your Sink?

source: springwellwater.com

Have you ever looked down at your sink and seen a strange greenish film? Not something most people are prepared to come across, but it can occur, so it’s important to know what this stuff is, and what to do about it.

What Causes Green Residue?

Green residue in your sink is most often caused by corrosion of copper. The green color in and around the pipe is a telltale sign that the copper pipes in your plumbing are breaking down. Copper pipes are widespread in plumbing and despite the fact that they are highly resistant to corrosion, it doesn’t mean they are immune to it! Copper turns green with corrosion, and that is what you are seeing in your sink.

Why Does Corrosion Happen?

There are a number of reasons copper pipes can corrode:

Water Quality: Water quality in your area will affect your plumbing. Acidic or mineral-rich water may make copper corrode faster.

Low PH Numbers: Water having a low pH number means the water is more acidic that can cause copper to corrode. If your water’s pH is under 7, that means it’s acidic and may be contributing to the problem.

Electrochemical Reactions: When you have different types of metals in your plumbing, it can lead to a phenomenon known as electrochemical reactions, which can cause the copper to wear away faster. This is a common occurrence when there is copper water pipes and other metals such as steel or iron.

The Age of Pipes: All plumbing will wear out eventually, even copper. Old pipes are more likely to corrode.

Is It Harmful?

The sight of green gunk in your sink might not cause you to panic, but green residue can affect your health and your pipes. But it depends: While the green residue itself might not be harmful, if it’s copper corrosion, you could be consuming bits of copper in your drinking water. Copper in high doses, in excess, can be detrimental in terms of health also causing bodily problems like nausea, throw up [vomiting], and lavatory [diarrhea].

Beyond the cosmetic issue, copper corrosion can weaken your pipes and lead to leaks. If left unaddressed, it could result in costly repairs or even a full plumbing system replacement.

What Should You Do?

If you see green gunk in your tank, it’s important to address the situation as soon as possible. Here are a few things you can do:

Source From: The first figure out what is causing the green gunk, make sure its copper corrosion. Contact an experienced plumber who can evaluate your plumbing system to help identify the problem.

Test Your Water: Get a water tested for pH and for excessive copper in your water. If this is the case, you may want to invest in installing a water treatment unit to alleviate the problem.

Replace the Corroded Pipes: If the corroded copper pipes are what has been causing these problems, replace them! Select copper pipes that include a coating to help prevent corrosion further down the line.

Maintenance: In order to keep your system corrosion and problem-free, keep the parts of the plumbing system clean and free of debris. Be vigilant for leaks and corrosion, and have them repaired as they are discovered.

green residue in sink
source: Reddit

How to Remove Green Stains:

Those green spots in your sink can be unsightly, but they also can often be cleaned away using some basic household cleaning solutions. Here’s what you can do:

Vinegar and Salt Mix: Combine white vinegar and salt in equal amounts to make a paste. Rub onto the green stains in your sink and leave for 15-20 minutes. Then rub the stains softly with a sponge or a soft piece of cloth. Rinse the sink with plenty of water to rinse it off. This is a way that allows you to break down the copper oxide and get rid of green stains, too.

Baking Soda and Water: It can create a paste with baking soda and water. Use this to the stains and rub lightly with a soft cloth or brush. Baking soda serves as a mild abrasive and will help remove the stains without scratching the surface of the sink. Then rinse the sink well with water.

There are commercial copper cleaners that work well to remove green spots from your sink. For optimal results, follow the manufacturer’s directions.

Lemon Juice: Lemon juice is acid by nature, and may be used to dissolve the copper oxide. Use fresh lemon juice and squeeze it on top on the green and let it sit for a bit. Then, lightly scrub at the stains with a sponge or cloth. Rinse the sink well to take away any lemon remains.

Preventative Steps: as you’ll see, however, it’s no use tackling the green marks without getting the root cause – copper corrosion in your plumbing – under control. As discussed above, have a licensed plumber change any corroded pipes. It not only stops green lines from coming back, but it also safeguards and keeps your plumbing system working in tiptop condition.

Note: Even when these methods work well to remove the greenish-colored stains due to copper corrosion, they still may not solve the problem completely. To treat the root cause in your plumbing system for something more long-term so you have a long-term fix.

If you ever see green crud in your sink, don’t dismiss or forget it. It’s an indication that your plumbing pipes could be in trouble and can fall victim to copper corrosion. By acting fast (quenching the burn), by locating the source, testing your water, and doing something about it with help from professionals, you can guarantee that your water is safe to drink and your pipes will last you for a long time. Don’t let the green mess stick!


As Seen In