How to Install RO Water Purifier at Home

Looks like you have purchased a brand new RO water purifier (Congratulations on that!); it is not of a surprise, considering the water conditions having the best water purifier in India is a must.

Reverse osmosis water purification system effectively cleans the water and provides you with safe and clean drinkable water. Not to mention, it also tastes good.

So if you have managed to purchase one, leave the installation part to us; we have you covered with this step-by-step installation guide.

Without further ado, let’s get started.

Where to Install a RO Water Purifier?

The most common place to install a water purifier is above the kitchen sink, albeit not the most optimal solution given the limited space. Make sure that you are installing it on a cold water line and avoid places where freezing temperature occurs.

Other places where you can install RO are the living room, utility room, and storage room while providing a running line to the kitchen skin. However, in this case, you might need a delivery pump.

How to Install RO Water Purification System?

Now it’s time to learn how to install your newly purchased RO water purifier above your kitchen sink. With some tools and preparations, it is not so tricky to pull that off.

Additionally, your water purifier should have listed all the necessary and detailed information on installing it; if you find that our guide and your installation manual are not just enough, then there are a plethora of YouTube videos to help you out.

Note:- Installation steps depend on your specific product and may vary from product to product. Therefore, we have provided the installation instruction as a general guideline. Depending on your product and plumbing, it may differ accordingly.


Make sure that you have adequate space under your kitchen skin to allot a filter module and tank.

Once you have your RO purifier delivered, cross-check all the components, check if they fit in their desired locations like pipes, etc, so that you will get an idea about adjustments prior to installing the RO.

Required Tools

Plumbing Tools

Get ready with all the tools before installing the RO; this will not only save you a ton of time but also a lot of frustration.

  • Installation Manual
  • RO Module
  • RO Membrane
  • Water Storage Tank
  • Filter Cartridges
  • Faucet
  • Installation Kit
  • Power Drill
  • Screw Driver
  • Wrench
  • Knife
  • Drill Bit
  • Towel
  • Cutter
  • Teflon Tape
  • Drill Bit

Now that you are ready with all the tools, let’s start installing the RO.

Faucet/Tap Installation

The first step towards the installation is installing the Faucet, which will provide you with great tasting, clean drinking water.

For starters, you will have to figure out where you are going to install it; unless you have an extra hole in your skin, you will have to drill one. Make sure to drill on a flat area for better convenience, plus it should be positioned correctly.

Note:- Depending on your material. You might need a particular type of drill bit.

Once you have dealt with the hole, put the faucet and secure it with a hex nut and washer. After that, attach the fitting and tighten it with a wrench.

Felicitations, you have just finished one of the most challenging tasks.

Drain Saddle Installation

The drain saddle or otherwise known as drain line adapter is responsible for the connection of drainage under the sink for RO WasteWater.

Before you start drilling, make sure that the drain saddle is placed far away from garbage disposal or dishwasher discharge if you have a dishwasher. This way, it will protect your RO water purifier from contamination and forestall clogging as well as obnoxious odors.

Moreover, we would suggest keeping it at least 6 inches above the p-trap.

Now you can drill a ¼ inches hole in the side or on the top of the drain line; make sure you don’t hole in the bottom. Next, align the camp hole and secure them with bolts; ensure that you are not over tightening the bolts.

Installing the Feed Valve

It’s time to connect the water line to the RO inlet feed valve.

Close the cold and hot water supply, and release the pressure by opening the respective outlets. Next, remove the tubing from the cold water valve. Install the new feed valve and tighten it with a wrench.

Now connect the water tubing to the installed feed valve and turn on the water supply.

Installing the Water Storage Tank

Now it’s time to place the water storage tank; if you don’t want to lose pressure, make sure to place it within 10 feet of the drinking water faucet.

Note:- When filled to the top, the tank can weigh more than 11KG depending on its size.

Around the threaded port, wrap about six Teflon tapes. After that, just screw it.


When mounting the RO, keep in mind that you will have to replace the membrane and filters every once in a while. Therefore, to keep your maintenance days hassle-free, keep some sufficient space underneath the system.

Installing the Filters and Membrane

We are almost done, assemble the filter components and screw them properly.

Now insert the RO membrane and pre-filters into their respective housings by following the instructions we have mentioned.

  • Insert the filter by removing the filter housing and then screw them back; make sure to keep the O-rings in place — tighten the filter with the wrench.
  • As for the RO membrane, remove the housing cap and push the cylinder in; after that, put the cap back whilst ensuring that the O-rings are not disturbed.

Voila, you are done with the majority of the installation.

Start the System

Finally, it’s time to see if you succeeded or not. Check all the screwing and make sure that there is no leakage. Next, leave the outlet pipe for drainage into the sink.

Connect the plug to the electrical socket and run the system.

After around 15 minutes, the water will come out of the dispenser, and it might have a darkish color — don’t worry about that. It is just the carbon fines flushing out.

Next, fill the tank and let the first batch be the test-run, meaning don’t consume it and flush it out as soon as it fills.

Note:- Some manufacturers recommend flushing it 2 to 3 times before use.

Again fill the tank and enjoy the freshwater.

Also Read About: 

RO vs UV Purifier

How to Purify Borewell Water at Home

Messed UP?

Not every single DIY stuff is going to be comfortable and straightforward. It is expected that you have messed up a few things along the way — maybe there is a leak, or the RO is not starting.

In such times, it is best to leave the job to the pros and call in a plumber to do the bidding.

Lastly, if you are confused and cannot do it, a video can help as a Video Says A Lot More Than a Thousand Words!

In Conclusion

Installing a RO water purifier is not that hard after all, right? However, if you are struggling to install it or are stuck — consider checking a YouTube video or call in a professional to do the job.

It will never harm to reach out for assistance other than a few bucks. So if you have managed to pull that off, then congrats, my friend. You can have yourself a toast of hard work and enjoy the sweet RO water.

With that being said, if you have doubts or questions — you know what to do.

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