How To Make A Water Filtering System At Home (DIY Steps w/ Videos)

Do you want to have an under-sink water filter in your kitchen?

Are you concerned about the cost of hiring someone else to install it for you?

Do you want to put in your own water filter system?

In this article, we’ll give you a step-by-step guide to help you learn everything you need to know about how to install a water filter system under your sink without any plumbing know-how required. This is a fairly easy task to complete without prior experience, but you should at least know how to use power tools before you get started.

For our purposes, we’ll also be using a water filter installation kit. These are easy to find and don’t cost a lot of money, and purchasing one of these kits gives you the added bonus of having all the pieces and parts you need on hand right away without having to run out to the hardware store and pick up anything you might have forgotten when putting the kit together on your own.

Here are some pros of learning how to make a water filtering system for yourself:

  • You can handle basic repairs of your water filter. You’ll know how it works and will be better able to repair broken parts.
  • You can deal with any problems that arise on your own. You can troubleshoot much more easily when you were the one who installed it.
  • It’s more affordable than hiring someone to do it for you. You won’t have to pay anyone else to handle this simple task.

Of course, there are a lot of other reasons why you might want to install your filter system yourself. Bring home a high-quality under-sink system today and find out!


working model of water purification
  • Power drill and ½ inch drill bit
  • Pliers
  • Multi-grips
  • chevron-right
    Teflon tape
  • chevron-right
    Water filter system kit
  • chevron-right
    Includes fittings, tubes, pressure valve, and filter


  • 1
    Look at the type of fittings you have under your sink to determine whether or not you need metal fittings or plastic ones. Most people will need plastic.
  • 2
    Turn off the water supply to your hot and cold taps.
  • 3
    Use pliers to remove the fitting to your cold water supply.
  • 4
    Look for a T-shaped piece in your filter kit. Use your pliers to loosen it as needed and then attach it to the cold water supply pipe under your sink.
  • Be sure you have a washer installed inside this piece before putting it in place. This will make the seal water-tight.
  • 5
    Use your pliers to tighten the T-piece securely into place.
  • 6
    Wrap the fitting for your T-piece with Teflon tape and screw it into place on the T-piece.
  • 7
    Attach the valve for the filter to the other side of the fitting. Use more tape if necessary to get everything secure and tightly sealed.
  • 8
    Reattach the tube for cold water to the top of your T-piece. Use your pliers to screw it in tightly.
  • 9
    Make sure the valve is turned off, then turn the cold water back on and test it for leaks and pressure.
  • 10
    Look for a tube that came with your kit. Attach it to your pressure valve by pushing it as far into the valve as it will go and then pulling back slightly.
  • 11
    Clamp your seal onto the valve and then snip the tube so that there’s a length of about 3 or 4 inches coming from the valve.
  • 12
    Push the other end of the tubing into the T-piece so the valve is installed.
  • 13
    Feed the valve into the “inlet” section of the water filter by pushing another length of tubing into the valve on one end and into the inlet on the other end.
  • 14
    Make sure to position the water filter system in the back of your cabinet. If you choose, you can use your power drill to mount it into the cabinet, but this is not necessary in most situations.
  • 15
    Use your power drill and drill bit to drill a hole into the sink near the faucet. This should be positioned in a good location near the faucet to give you enough room for the filter tap. Be careful and drill slowly for this step.
  • 16
    Your water filter kit should have come with a tap and fittings. Install the tap by pushing it through the fittings and then threading it down through the hole you just drilled in the sink.
  • 17
    Back under the sink, finish this attachment by tightening it with a washer and the installation plate that should have come with your kit. Tighten it until it is firmly sealed.
  • 18
    Screw on the included valve to the bottom of the filter tap until tightened.
  • 19
    Use more of your tubing to connect the tap to the second inlet on your water filter system the same way you did previously.
  • 20
    Turn on the ball valve and the tap water. Let it run for a little while and it will begin filtering water.
  • 21
    Double-check to be sure nothing is leaking. If you don’t have any leaks, your water filter system is installed properly and is ready for you to use!


So what do you think? Do you feel comfortable with your ability to install your own water filter system without having to ask someone else to do it for you? This task does require a little bit of skill, but it’s very simple if you purchase a kit. You should not have to worry too much about learning new or difficult abilities, and you don’t really need to know much about plumbing when you install an under-sink filter, either. Remember that a whole-house water filter is much more complicated and may require plumbing knowledge, however.

It’s always a great idea to use a water filter like this. Here are a few advantages of having filtered water from your faucet:

how to make a water filter for home use
  • You won’t have to worry about hard water spots on your dishes anymore. With filtered water, your dishes will be clean every time you wash them in the sink by hand.​​​​
  • You can save money on buying bottled or filtered water. You’ll have clean, fresh drinking water right out of your tap, so no more need for buying fancy water or taking up fridge space with a filter pitcher, either.
  • You can wash your vegetables in filtered water. This will help cut down even more on the risk of exposure to heavy metal contaminants as well as bacteria in your food.

Keep all this in mind when you’re trying to determine whether or not an under-sink water filter is right for you. There are many great reasons why you might want to have a product like this as part of your home, and you’re sure to love the results you’ll get when you install one yourself, too.