Most people don't think about what happens inside the filter when they use their refrigerator water dispenser every day. You press the button, and water comes out. That's all there is to it. It's easy, right?
Your refrigerator water filter is doing a quiet but important job behind that glass of water. Before the water gets to your glass or ice maker, it helps get rid of bad tastes, smells, particles, and some contaminants. That's why a lot of people look up how refrigerator water filters work before they buy a new one.
This guide breaks down the process into simple terms so you can understand what your fridge filter does, what it doesn't do, and why it's important to replace it on time.
What Is a Refrigerator Water Filter ?
A refrigerator water filter is a small cartridge that goes inside or behind your refrigerator. It connects to the water line that brings water to your ice maker and water dispenser. The filter media catches or reduces some impurities in the water before it comes out.
Activated carbon is what most refrigerator filters use. The CDC says that built-in refrigerator filters often use activated carbon and are mostly meant to make water taste and smell better.
So, the main job of a fridge filter isn't to make water clean like magic. It's more like a smart cleaning step that makes the water you drink every day taste and smell better.
How do the water filters in refrigerators work?
To answer the question "How do refrigerator water filters work?" we first need to look at how water moves. A water line connects your home's water supply to the refrigerator. Before the water gets to the ice maker or dispenser, it goes through the filter cartridge.
Inside the cartridge, the water normally flows through layers of filter material. Because it has a lot of holes in it, activated carbon is used in many filters. Things like chlorine that affect the taste and smell stick to this surface. The CDC notes that while the filter is working, objects can attach to its surface or get lodged in its pores.
Activated carbon is like a sponge with a lot of little pores in it. As water passes through it, some particles and chemicals that you don't want stick to the surface. The cleaned water flows through the refrigerator system and either comes out of the dispenser or goes into the ice maker
The short answer to the question, "How do refrigerator water filters work?" is this: Depending on the type of filter, water goes in, passes through the filter medium, and comes out with less flavor, smell, and certain pollutants.
What Do Refrigerator Water Filters Take Out?
It depends on the filter. Different refrigerator filters get rid of different things. Some of them mostly get rid of the taste and smell of chlorine. Some are certified to get rid of more dangerous pollutants like lead, mercury, asbestos, some chemicals, and some new pollutants that are starting to show up.
The NSF says that NSF/ANSI 42, 53, and 401 are some of the most common certifications for water filters. NSF/ANSI 42 is all about how things look, smell, and taste, as well as chlorine. NSF/ANSI 53 is about things that can make you sick. Some new pollutants, like some drugs and chemicals, are covered by NSF/ANSI 401.
LG says, for instance, that some real refrigerator filters use a dual filtration system. One layer helps get rid of bigger particles, and a carbon filter helps get rid of impurities and make the taste better. LG also says that some filters meet NSF 42, 53, and 401 standards.
This is why it's important to look at the filter label. A filter can only lower the levels of the things it is made and tested to lower. You shouldn't assume that the filter removes a certain contaminant if the label doesn't say so.
How Well Do Refrigerator Water Filters Work?
Many people ask, how well do refrigerator water filters work? The honest answer is: they work well when they are the right filter, properly installed, and replaced on time.
A good refrigerator filter can improve water taste, reduce bad smells, and help make ice taste fresher. Some certified filters also reduce selected contaminants. But refrigerator filters are not the same as full house water systems or reverse osmosis systems.
The CDC clearly advises checking a filter’s product label because filters that remove germs may not remove chemicals, and filters that remove chemicals may not remove germs.
So, refrigerator filters work well for everyday drinking water improvement. They are useful, convenient, and easy to maintain. But they are not meant to fix every water problem. If your home has known water safety issues, you should check your local water report or speak with a water treatment expert.
Why refrigerator filters use activated carbon
Activated carbon is a popular choice because it works well to get rid of bad smells and tastes. It is also small enough to fit inside a filter cartridge for a small refrigerator.
When water flows through activated carbon, some things stick to the carbon surface. Depending on how the filter is made, this process can help get rid of some organic compounds, as well as the taste and smell of chlorine. That's why water from a new refrigerator filter usually tastes cleaner and smoother.
This is also why old filters stop working well. As time goes on, things get stuck on the carbon surface. The filter media can't keep working at the same level once it gets full. LG says that filter media gets full over time, which makes it less able to filter water well.
Does the filter have an effect on ice?
Yes, it does. Most of the time, the same filtered water that goes into your refrigerator's ice maker comes from the same place. Your ice will taste cleaner if the filter is new. Your ice might start to smell or taste bad if the filter is old.
This is more important than most people think. Ice that doesn't taste good can ruin cold drinks, smoothies, iced coffee, and even drinks that are already in the fridge. In short, one worn-out filter can make your whole kitchen feel bad. Not needed behavior.
Why it's important to change the filter
No refrigerator filter lasts forever, not even the best one. Depending on the brand, model, water quality, and how often you use it, most refrigerator filters need to be changed every six months. LG says that most refrigerator filters should be changed every six months.
If you keep using an old filter, you might notice that the water flows more slowly, tastes strange, smells bad, or makes cloudy ice. You might also see a filter warning light. A filter that is blocked can also make the ice maker and dispenser work harder.
Changing the filter on time keeps the water flowing smoothly and helps the filter do what it was made to do.
How to Pick the Best Water Filter for Your Refrigerator
The best way to find a new filter is to look at the model number of your refrigerator or the part number on your current filter. If you buy the wrong filter, it might not fit right, it might not filter well, it might leak, or the water flow might be low.
Frost Water Filter can help with this. Frost Water Filter makes it easier to find replacement filters that will work with different types of refrigerators. The goal is simple: help you keep your water and ice tasting good without making filter shopping feel like a mystery movie.
Last Thoughts
You now know how water filters in refrigerators work. They take water from your home's supply, run it through filter media, and help get rid of unwanted tastes, smells, particles, and certain contaminants, depending on the filter.
They work best when you use the right filter, put it in the right way, and change it on time. A new water filter for your refrigerator makes the water taste better, the ice cleaner, and the daily use of the fridge dispenser smoother.
Don't ignore the light on your refrigerator filter the next time it comes on. That little light isn't trying to bother you. Your fridge is basically saying, "Hey, I can help you."