Where to Install a Reverse Osmosis System? Find Out Here!
Written by: Alexandra Uta // Last Updated: Jun 8, 2023
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Just got yourself a brand new reverse osmosis system but didn’t think about where you would put it?
Don’t worry; we got you covered!
Let’s look at what to expect when installing a reverse osmosis system and where it needs to go based on your particular system type and household requirements.
Contents
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Key Takeaways
- Countertop reverse osmosis systems should be installed on the sink or countertop close to the feed water faucet.
- Under sink RO systems are usually installed under the kitchen sink but could also be installed in a nearby utility closet or basement.
- Whole house reverse osmosis systems are usually installed right next to the main water line, probably in a basement, garage, or utility closet.
Where to Install a Reverse Osmosis System
So, where to install a reverse osmosis system?
Where you will install your RO system depends on a few factors:
- First, what kind of system do you have (whole house, countertop, or under sink)?
- It may also depend on size constraints and which particular sink you want to access your RO water from. Usually, it is the kitchen sink, but some do decide they want it in their bathroom!
Under sink reverse osmosis systems usually are placed directly under the sink that will be utilizing the RO water, countertop models are installed on the counter very close to the sink, and whole house systems need a bigger space, like a garage or basement. Whatever the system, it needs to be linked with the cold water line and not exposed to freezing temperatures.
Under a Sink
As the name suggests, most of these systems go under the kitchen sink. The tank needs to be close to the RO faucet to push water through; if it is too far away, some kind of pump might be required to ensure the delivery of the water to the faucet.
A rookie mistake is not measuring the space under the sink before purchasing the reverse osmosis unit. You need space for the module and the tank, plus enough room for you to maneuver yourself around when replacing filters or performing maintenance.
If you have already purchased the system and it does not fit, you can install it in a nearby cupboard or basement, then run lines up to the sink.
On Your Countertop
Countertop units are the most straightforward RO systems to install, so they are recommended if you want something very simple. It needs to sit on the counter close to your faucet, where it will be connected and secured.
Basement, Garage, or Utility Room (Near Main Water Line)
If you are working with a whole house reverse osmosis system, this is best installed as close as possible to the main water line where water enters the home so that it is purified before it is distributed to the rest of the house. This often happens in a basement, garage, or utility room and somewhere where freezing temperatures do not occur.
Installing a whole house reverse osmosis system is complicated and should only be done if you have significant DIY and plumbing experience; otherwise, call in a professional.
What to Expect from RO System Installation
When you install an under sink reverse osmosis system yourself, you can expect it to take a couple of hours. It is easier if you have someone there to help you, particularly when you attach the RO faucet, as this requires tightening under the sink while holding the faucet on the sink. Tricky!
Watch a few instructional videos so that you feel prepared, and get to know your system’s components so that the instructions make more sense.
Have your tools and materials prepared and ready before beginning, and maybe do some stretches before diving in, as it can get a little cramped!
How to Install a Reverse Osmosis System Step by Step
Before beginning the installation process, measure the space under the sink and determine where all your components will go. Test to see if they fit in the desired location. Then, prepare your materials and turn off your water supply.
What You’ll Need
- Your system installation manual
- RO module
- Water storage tank
- RO Faucet
- Filter cartridges and the RO membrane
- Installation kit including color-coded tubing, filter wrench, stop connector, tank valve, faucet connector, drain saddle
- Power drill
- ¼” (⅜”) (½”) drill bit (size depends on faucet type used)
- Screwdriver
- Tubing cutter
- Utility knife
- Adjustable wrench
- Teflon tape
- Towel
Instructions
- Drill a hole in your countertop or sink for the RO faucet. It should be positioned on a flat surface with convenience in mind.
- Install the drain saddle on the sink drain line — it needs to be above and as far away as possible from the dishwasher discharge and garbage disposal so the lines don’t clog.
- Remove the tubing from the cold water valve and install the new feed valve. Reconnect the tubing.
- Place the storage tank within 10 feet of the RO faucet. Wrap the threaded port at the top with tape and screw on the tank connector.
- Mount and connect color-coded tubing on the RO module to the feed water valve, tank valve, drain saddle, and RO faucet.
- Install all filter elements (pre-filters, RO membrane, post-filter).
- Turn the water on and check the system for leaks while running the RO faucet.
- Fill the storage tank and drain it a few times before use to allow the system to flush out any debris.
Further Reading:
Which Professionals Install Reverse Osmosis Systems?
Most plumbers would be able to install a reverse osmosis system if you do not want to attempt it yourself. Search for a plumber in your area that has experience with RO systems specifically, or ask your RO system retailer if they have any recommendations for a reliable plumber.
The cost will vary, but it is usually $150-400 for a standard under sink system and $500 at an absolute bare minimum for a whole house system (usually a lot more).
If you have any questions about where to install a reverse osmosis system please don’t hesitate to leave a comment below!
About the Author Alexandra Uta
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