Under Sink Reverse Osmosis System Installation Guide

Good day folks, Rod from My Water Filter here today.

What we're going do is have a quick chat on how to install a reverse osmosis system under the sink. Reverse osmosis (RO) systems are very popular water filter systems, and they come in a variety of styles. The HPF 7 Stage, HPF 4 stage, and the Aquasana are all different in appearance, they are all the same when it comes to installation.

There are a couple of ways to get the installation done.

Get a Plumber to Install your Reverse Osmosis System

Use your own plumber or hire one that is in your area to work on the installation for you. It will take about 1-2 hours, and you should be good to go.

Being an under sink system, the plumber may need to drill through the benchtop to install the faucet. If you have a stone benchtop, then they may charge you extra for that.

The Hardest Part of Installing it Yourself

If you can get a drill and drill through the top of the stainless steel sink to install the faucet, then that might already be the most challenging task for you.

Reading the instruction manual will take you through the whole process. To find your installation manual, search for your product in the search bar above, and you will find the installation manual on the “Installation” tab on the product page.

We also send a copy of this out via email when you purchase your reverse osmosis water filter through My Water Filter.

My Water Filter Reverse Osmosis Systems

All our reverse osmosis water filters come as a complete system. They come with everything that you need to install except the tools.

You don’t need to purchase anything else to complete the installation. We provide all you need and the best service we can and get everything to you in one go.

If you're going to get an RO system, make sure you've got enough room. To see how big they are, you can see the size on the product page of our website.

Installing the Under Sink Kit for a Reverse Osmosis Water Filter System

Here are the steps to install an RO system:

The first step is to turn off the home’s water mains.

Go back to underneath your sink and undo the flexible chrome pipe up that connects to your kitchen tap.

Install the under sink water filter kit by installing the t-piece. The T-Piece can come in all different shapes and sizes depending on the manufacturer.

The t-piece is what allows water to go to both your water filter and your kitchen sink.

Water Filter T-Piece

Connect the flexible chrome pipe back to the main water line.

Use the white tubing to feed water to the water filter.

Installing the Water Filter Housing

The water filter housing comes in 2 parts usually — the bracket with large cartridges hanging down vertically and the inline cartridges that clip on above the bracket.

Screw the housing bracket into the wall inside your cupboard. Ensure you leave about 3cm below the bottom of the water filter houses so you can screw the housings on and off.

The inline cartridges can be clipped on and off as necessary, so if you don’t have much room in your cupboard, you can remove the inline filters on top and lay them down so the water filter can fit.

Clipping off the inline cartridges from the system

The Cartridges

Cartridge housings

When you receive your RO system, you will have to install the drop-in cartridges into the housings below the bracket.

Install the sediment in the first position where the water comes in and the carbon block in the 2nd position.

The RO Membrane

The RO membrane has a unique housing that has its own housing removal tool. Undo the RO membrane housing with the tool and install the membrane.

Installing the Tank

Most RO systems have a 12-litre tank. The tank can be installed any way to fit into your cupboard. If it's too tall, the tank can just sit on its side if that helps.

When you receive your water filter, you will get a bag of goodies. This bag will have all the small parts in it, and in it, you will find this tank tap.

Water tank tap

This tap is screwed straight on top of the water tank, and then the pipe that you use will push it directly into this tap which will connect to the tank to the water filter.

Once the water goes into the tank, it'll come back along that same water line. So there's only one water line to and from the tank.

RO Water Filter Waste Water Setup

The membrane splits the water into pure water and wastewater. When you turn it on, it starts making water, and the pure water will go into the tank. At the same time, we'll have about the same amount of water go down the drain.

Install the wastewater clamp to a pipe that is going down the drain. You will have to drill a hole in the pipe, so the wastewater coming from your water filter will go down the drain through the wastewater clamp.

Attach the wastewater tubing from the RO membrane to the clamp, and your wastewater component is set up.

Connect the RO System to the Faucet

Once the water has passed through all the cartridges, there will be tubing to take that water to the faucet. Connect that tube to the bottom of the faucet underneath the sink.

Reverse Osmosis Flow Rate

The RO systems make water slowly. It'll make water about 200ml per minute, depending on the pressure you've got in your home and the water quality.

When you get it all set up, and you turn this system on, you'll start to see the water dribbling of the faucet.

It'll flow at 200ml per minute. You might think that's a terrible flow rate, but that is normal for RO systems to be effective.

Flushing the Cartridges

Once you have installed your water filter you will want to flush the cartridges. This is normal for all water filters to remove any fines from the cartridges.

Turn the tap on to push water through your RO system for about 3 hours. Due to the filtration speed, it will take about this long for the water flow through the cartridges enough to give the cartridges a good flush.

It’s good to fill the tank three times or 36 litres. Each tank flush will take about an hour. When it’s full, turn the faucet on, and drop that water down the sink.

After three times, you can now have a taste of your new filtered water.

Please watch the video for more information, and if we can help you out with anything, please let us know.

Installing other varieties of RO Systems

RO systems come in different shapes and sizes, but they all share the same installation process.

Get a plumber or do it by yourself and you will have your water filter up and running for you and the family in no time.

Thanks very much.

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