How to Install a Countertop Water Filter: (6 Easy Steps)

Countertop water filters offer an easy and relatively inexpensive filtering method to maintain the integrity of water in your home. The best countertop water filter will remove any contaminants that could be lurking in your tap water.Learn how to install a countertop water filter in this easy DIY guide. 

Countertop water filters are not particularly large and come in two varieties of styles and sizes. The first type has a large reservoir on the bottom with a filter on the top. The second type hooks into your home’s main water at your kitchen sink. These types are much smaller and take up very little counter space. 

Before installing a countertop water filter ensure that you are choosing the best size filter. To determine which size to buy consider how many gallons of water you consume on average in a day.

how to install a countertop water filter

According to recent USDA research, on average an adult should consume ½ gallon per day or eight 8-ounce glasses of water each day. Most households use filtered water for cooking also. This doubles the average usage of the water filter to 1 gallon per person per day.

So, when choosing which countertop water filter to purchase, get the filters with the best holding capacity. The bigger the holding capacity, the more reserve you will have to peak your consumption needs. In this article, we’ll look into how to install a countertop water filter and other DIY tips.

How to Install a Countertop Water Filter 

A countertop water filter comes pre-assembled with everything you’ll need during the installation. Typically for installation, you’ll receive;

  • the filter housing                         
  • The filter cartridge 
  • Hose and water valve 
  • Wrench which you may need to change the filter 

These filters are installed next to the kitchen sink. The tap water will pass through either a separate faucet attached to the filter or through a second opening on the diverter. 

Step 1: To connect the unit, you should first take the aerator off from underneath your faucet. 

Step 2: Determine the type of thread. Note; adapters are included with each countertop filter which will fit most faucets. Pick the size that fits with your faucet.

Step 3: Place the water filter in a convenient location on the sink to attach the diverter to the faucet. 

Step 4: Attach diverter valve to a faucet; turn the swivel collar anticlockwise to tighten. Ensure that the gasket inside the diverter is positioned securely between the valve and a faucet. Rotate the diverter valve to the desired position.

Step 4: Turn on your water and pull the knob on the diverter valve.

Step 5: Run cold water for a few minutes to flush out any carbon fines which may be present. This is Normal. The water may also have some bubbles and the water may taste slightly sweet. This is also normal and will clear up after flushing. It should channel through the faucet as usual

Step 6: To only stop water flow through the filter, turn the diverter handle off. To stop the flow of water completely, simply turn off your faucet and the diverter valve will automatically return to its normal position.


How Do I Find The Best Countertop Water Filter? 

Looking for the Best Countertop Water Filters? You can Learn More Here 

How to Install Countertop Water Filter to a Pulldown Faucet 

Pull-out faucets can add a lot of functionality and convenience to one’s kitchen. With a pullout faucet, you can wash dishes, clean groceries, and wash off the sink and its surroundings. Moreover, they can create beauty and style to the overall look of your countertop.

 When installing the countertop water filter to a pulldown faucet, it’s practically difficult to connect the countertop pipe on the pulldown faucet because of the space problem and the faucet has a weight in the middle of the hose that assists it to retract back into the spout.

Nonetheless, if you already have you aren’t willing to give that up you might request a Claryum Countertop Filter which can easily be installed onto your kitchen faucet. 

How to Install a Pulldown Water Faucet 

Installing a pull out kitchen faucet is a simple DIY job. The materials required to complete this project consist of ;

  • faucet
  • a screwdriver
  • an adjustable wrench
  • a basin wrench

Step 1: The very first thing you’ll do is turning off the hot and cold water inlets for your kitchen faucet in the cabinet below the faucet. You can also shut off the primary valve. Mount the faucet assembly to your countertop or sink. Position a little bucket below the valves. Then, loosen the nuts connecting the water supply lines to the valves using the adjustable wrench. You’ll have to loosen the nuts holding the faucets to the sink using a basin wrench.

Step 2: Pull out the supply lines and assemble the faucet if it isn’t already assembled. Connect all of the hoses through the center hole within the sink’s rim.

Step3: From underneath the sink, slide the triangular plastic washer, then the fiber washer, metal washer, and lastly the circular nut over the hoses to attach the faucet to the sink. 

Step 4: At this point, pull out kitchen faucet on top of the sink in an upright position and then use the basin wrench to screw the circular nut for the threads to the faucet stem. Then clamp the nut to the plastic washer with the screws.

Step 5: Connect the water supply lines to the valves. Be certain you connect the warm water supply line to the warm water valve and also the cold water supply line to the cold water valve. The hot supply line which has a white tag should be connected to the hot water inlet 

Step 6: Now, loop the loose end from the spray hose up and connect it to the third line coming from the faucet. You’ll need to use your adjustable wrench to tighten the nuts connecting the supply line to the shut-off valve.

Step 7: Check whether to ensure the faucet retracts by pulling it out.

Step 8: Turn the warm and cold water valves and check for leaks. Get rid of the aerator that’s at the tip of the faucet’s spray head. Turn on the pull out kitchen faucet to flush the pipes and spout.

How to Convert Countertop Water Filter To Under Sink 

Step 1: detach the water tubing at the cold water shutoff valve below the sink by simply undoing the nut 90° anticlockwise and removing the tubing from the valve fitting.

Step 2: briefly position the filter on the wall cabinet and level the filter on the wall to mark the bolt fixing points for the mounting bracket.

Step 4: drive a couple of screws and stick in the wall the mounting bracket.

Step 5: link the tubing from the kit on the filter and screw the filter on the wall cabinet.

Step 6: Secure the mounting screws on the wall. Secure the connection with an adjustable wrench. You want the connection to be snug but don’t over tighten. 

Step 7: connect the tubing that leads from the filter to the shutoff valve.

Step 8: Insert the hoses from the mounting hole 

Step 9: Feed the hose and the faucet shank through the spout base gasket. Insert the entire assembly into the mounting hole. Make sure the handle is on your right and the spout is facing you.

Step 10: if your countertop or sink is less than a half-inch install the support bracket and the mounting washer for added stability. If it’s greater than a half-inch only install the mounting washer in.

Step 11: Connect the water supply pipes to the Faucet Stem .

Step 12: briefly snug the filter, select the cold setting and load the unit with water to flush the system to remove any debris .

How to Connect Countertop Water Filter to Incompatible Faucet Head 

Step 1: Make sure the faucet handle is in the off position.

Step 2: Connect the hose to the faucet.

Step 3: rotate the adjustable knob clockwise to turn the water back on.

Step 4: Let the water run for about 15 seconds to clean off any dirt from the system.

Step 5: Tighten it with an adjustable wrench just until the hose nut is flush with the wand

Clean the surrounding area that might inhibit hose movement.


For homeowners who want to enjoy pure, great-tasting water from their kitchen faucet, installing countertop water filter system with activated carbon filters, filters that perform ion exchange, and micron filtration will get their wishes answered. The water not only tastes great, but it also assures the homeowner of drinking safe water.

Once one has installed a countertop filter, he or she can feel free of water-born worries. No need to worry about fluoride in the tap water or arsenic in the tap water.

Marcus Reynolds
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