What is Reverse Osmosis?

Jul 8, 2011 by

Reverse Osmosis is a water purification method. It is often referred to as a 5 stage filtering system because the water passes through 5 stages (steps) to purify it. You also get 6, 7 or even 8 stage systems and all this means is that extra stages or steps have been added.

Highly rated purification method

Reverse osmosis is a highly rated purification method because it is so effective. Testimony to its purity is the fact that it is often used in hospitals and labs where water purity is important.

Popular for home use

Its a popular system for home use because of the high quality of the water produced. Home is where the people that you love gather, so it makes sense to use a reputable water purifying method.

What are the 5 stages that the water passes through?

(Stage 1) 5 Micron sediment filter:
Removes sediment, rust dirt and other solid debris

(Stage 2) Activated carbon filter:
Removes chlorine and organic chemicals.

(Stage 3) 1 Micron sediment Filter :
With only 1 micro rating, it provides effective  filtration to protect your membrane, and make it last longer.

(Stage 4) Reverse osmosis membrane

Removes water contaminates such as lead copper, barium, chromium, mercury, sodium, fluoride, nitrite and selenium.

The pores in the Reverse Osmosis membrane are about .0001 microns. To give you some perspective, the smallest bacteria is 0.02 micron

(Stage 5) Post-carbon filter
Polishes the water and enhances the taste.

Here’s a diagram that shows how it works

Where do I put it?

Usually in the cupboard under the kitchen sink. Its also popular under the prep bowl if you have one.

What maintenance is needed?

The filters are changed once a year. The membrane is changed every 3 years. This can vary according to the water quality and amount of water used.

Do you do the installation?

We are in Gauteng and install within a reasonable distance of this area. We courier or post the system to other area’s. The installation can then be done by a plumber or handyman.

How do I order?

You can click here here to go through to our shopping cart to order online. You can also order by phone or email or have a sales rep call you.

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  1. charles

    please quote me for a unit for reverse osmosis, advise capacity, regards, Charles, cell 073 723 7306

    • Naturalwise

      Sure. Our 5 stage RO system costs R4735, including Vat. We charge R45 for delivery to major areas throughout SA. We can install in JHB for R595 extra or you can install yourself or get a plumber or handyman to do it.

      Our system has a 15L storage tank and produces 200 litres of water per day. You can see the full specs on our online shop by clicking this link:

      You can order online or by phone or email. Hope this answers your questions. Let me know if you need any other info.

  2. Hennie Theron

    I have a problem. The overflow pipe to the drain is running all the time. I know that our water pressure in my area is very high and may be the problem.

    Please help


    • Naturalwise

      Hi. You will need to contact the people who sold your system to you. We only do maintenance for people that bought through us. Sorry. I hope you come right.

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