How to Change the Whole House Water Filter – 8 Easy Steps

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Water filters are important because we drink from them every day. But most people don’t realize that the water coming out of their faucet has a lot of impurities in it. This causes health problems such as cancer, diabetes, heart disease, and even premature aging.

Most people don’t know that changing their home water filter will make a huge difference in their lives. In fact, it may save their lives.

I’ll explain to you how to change your whole house water filter with ease and get rid of all the bad stuff that comes out of your tap.

how to change the whole house water filter

What are Whole House Water Filters?

A whole house water filter is a system installed where the main water line enters your house. It helps remove contaminants such as chlorine, lead, iron, sulfur, and other chemicals from your water before it reaches your taps.

Whole house water filters are great for homes with multiple bathrooms or kitchens. You can install one in any room of your home, including the kitchen, bathroom, laundry room, etc.

They work by removing contaminants from the water before it flows through your pipes. Once the water leaves the filter, it goes straight to your taps without passing through any additional plumbing.

Whole house filtration systems are affordable and convenient. They’re easy to install and maintain, and they save you money on bottled water.

How Do Whole House Filters Work?

There are two main types of whole house water filters: those that use activated carbon and those that use ion exchange. Both work well, but activated carbon filters are better at removing chlorine and other disinfectants. Ion exchange filters are better at removing heavy metals and minerals.

Activated carbon water filters are great because they remove many types of contaminants from your drinking water. But sometimes, you may want to add additional filtering capabilities to your whole house water filter. One way to accomplish this is to purchase a whole house water filter that comes with an added silver or KDF filter. These filters will kill off any harmful bacteria and prevent future contamination.

Whole house water filters come in several sizes. Some are small enough to fit under a sink, while others are big enough to cover entire rooms. Whichever size you decide to buy, be sure to pick one that fits your needs.

To find the right whole house water filter for your home, start by checking the specifications of the filter. Look for a rating that indicates how much of a particular pollutant the filter removes. Also, look for a rating that shows how long the filter lasts before needing replacement.

Once you’ve found the right whole house water filter, you should consider adding a silver or KDF filter to it. These filters will kill any bacteria that might enter your home. And since these filters are attached to the whole house water filter, they won’t clog like regular filters.

Why do You Need to Change the Filter?

Changing your water filter every once in a while is a smart move. Not only does it keep your water clean and healthy, but it also makes sure that your whole house water filtration system works properly.

A high-quality water filter will last longer and work more efficiently than low-quality ones. High-quality water filters can last up to 36 months, while others may last just 3 months.

Check to see if your cartridge needs changing before buying new ones. If you notice any problems with your current cartridge, such as weak water flow or unpleasant taste, then it might be time to replace it.

Don’t just think that because your filters don’t seem to be working properly, they’re actually defective. Some filters simply require replacement due to wear and tear.

To find out whether your cartridge needs replacing, check the owner’s manual of your whole house water filer.

What Happens If You Don’t Change Your Filter?

If you don’t change your water filter according to plan, you risk compromising the performance of your other household appliances. Changing your whole house water filter every year or two is important to keep your home safe and healthy.

You should never leave your water filtration system unattended. Doing so means that you risk contaminating your entire home with harmful germs and bacteria. To avoid this problem, you should change your whole house water filter at least once a year.

How Do You Know When to Change Your Water Filter?

There are several signs that your filter needs replacement. One of those signs is a slow decrease in water pressure, especially after heavy rain storms. Another sign is when your drains or faucets start making odd noises. And finally, if your water tastes bad or becomes cloudy, then it’s probably time to replace your water filter.

To tell if your water filter needs replacing, simply check its condition. Look for cracks, leaks, rust, mold, dirt, or any other problems. Also, check the outside of the filter to make sure it doesn’t look damaged.

Once you find any issues with your water filter, call your local plumber to schedule a service appointment.

How to Change Whole House Water Filter

Step 1: Turn Off Water Supply And Release the Pressure

If you want to change the whole house filter, follow these simple steps. Make sure you turn off the water at the valve or the mains before turning off the power. Then, press the red knob to release the pressure.

Step 2: Remove Casing And Tidy O-Ring

Screw out the casing and remove the big O-ring (the part that sits inside the casing)If the O-rings come with a large diameter and black plastic bands, clean them before replacing them in their original positions. If it has become dirty, get a new one instead.

Step 3: Thoroughly Wash Casing

Wash the case well with warm water, olive oil, and a soft brush; if necessary, clean it with a plastic brush. Do this gently and carefully, otherwise, you may damage the rubber seal.

Step 4: Apply Lubrication To O-Ring

Apply lubrication to the O-ring using clean silicone grease. Doing this will keep the O-ring sitting securely in its casing.

Step 5: Buy And Install New Water Filter Cartridge

Buy a brand new water filter cartridge and install it in the housing. Make sure the filter is placed in the middle of the standpipe.

Step 6: Screw Casing Into Cap

Place the new filter cartridge into the casing. Make sure the filter fits snugly into the casing. Don’t tighten the casing because doing so can cause cracks.

Step 7: Turn Water Supply On And Test the Pressure

Turn the water supply back on. Slowly turn the inlet switch until the water flows smoothly. This means the water is flowing through the filter.

Step 8: Replace Casing In Standpipe

Replace the casing with the new filter cartridge. Make sure the filter stays centered in the standpipe.

Tip: Never tighten the casing. Doing so can cause cracks. Instead, just screw it firmly enough to hold it in place.

How Often Should I Change a Whole House Water Filter?

Every 3–6 months, you should change out your entire house water filter. You shouldn’t have to think twice before changing your whole house water filter.

Whole house water filters are installed on the main supply lines, delivering clean water to your entire home. These systems are typically installed under sinks or near toilets. They’re more expensive than regular water filters, so you don’t need to worry about the water’s quality throughout the entire household.

To keep your whole house water filter working properly, replace it every 3 to 6 months depending on how frequently you use your tap water.

How Long Does a Whole House Water Filter System Last?

A whole house water filter system lasts for approximately 12 months. You should replace your whole house water filter every year or two. But if you notice any problems with your current filter, such as slow flow rate, discoloration, odor, or excessive sediment build-up, then you may need to replace your filter sooner.

To determine how long your whole house water filter system will last, you need to know how old it is. Most filters come with a warranty that tells you how long they will last. And if you find that your filter isn’t lasting as long as expected, then you should contact the manufacturer to ask about replacing it.

Benefits of a Whole House Water Filter

A whole house water filter is a great investment if you live in an area where there is a lot of pollution or if you have a special water concern. You can enjoy peace of the house with healthy showers and baths, increased life expectancy, soft water with no spots on glasses, soap that doesn’t leave lather marks, and healthier skin and hair.

Whole house water filters provide extra protection to each outlet in your home. Contaminants can be absorbed through your skin and can be absorbed through your lungs, so it is important to protect yourself. If you have any special water problems, the entire cell carbon filter is recommended to filter the whole house. If you have special needs, you may require a whole house water filter.

Enjoy peace of the house with a healthy shower and bath, increased life expectancy, softer water with no spots on glassware, soap that won’t leave lather marks on clothes, and healthier skin and hair.


Do Whole House Water Filters Reduce Water Pressure?

May cause decreased water flow: The water flows through the filter at a specific rate. If you’re taking a shower, washing dishes, and using the sink at the same moment, you might notice a decline in water flow.

Where Should I Install a Whole House Water Filter?

Usually, the best location for a whole house filter is near your main faucet, which is usually located in the kitchen or bathroom. If you don’t have either of these locations, then look for one near your main shut-off valve.

Is Replacing a Whole House Water Filter Difficult?

On a 1–10 rating, installing a whole house water filter would be rated 5 out of 10. You’d need some experience and good equipment to get it done quickly.


The water filter system in your home is an essential part of keeping your family safe and healthy. It filters harmful contaminants from the water supply, ensuring that your drinking water is clean and pure. However, sometimes the filter gets clogged up and stops working properly.

In order to fix this problem, you need to replace the entire filter unit. This is a simple procedure that anyone can perform. All you need is a little bit of knowledge and a few basic tools.

Joanna G. Lackey

Hi, I'm Joanna, a writer freelance writer who specializes in topics about health and nutrition. I live in the Pacific Northwest with my husband and three children. I'm a mom to two dogs and a cat. I love reading, writing, and taking photos.