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Water Experts
The three RO pre-filter cartridges: sediment, GAC and carbon block1 / 5
Water Experts · Replacement Cartridges

RO Pre-Filter Kit, 6 Month

Stages one to three. Every six months.

The three cartridges that do the dirty work and wear the fastest: 5 micron sediment, GAC and carbon block. Fits the AquaShield and every standard 10 inch system. Fit it every six months and the membrane, the expensive stage, lasts its full three years.

R120R138the price you pay

You save R18 against the parts bought separately

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Delivery estimate
Sediment, GAC and carbon block in one box
Fits the AquaShield and any standard 10 inch system
Protects the membrane
Fifteen-minute change
Every 6 months
In detail

Why every six months

The sediment stage blocks, which you can see. The two carbon stages saturate, which you cannot. Once the carbon block stops holding chlorine, the chlorine reaches the membrane and quietly destroys it over a few weeks. A kit twice a year is what stands between you and a new membrane every six months, which costs more than twice as much.

Fitting, fifteen minutes

  1. Close the feed valve and the tank valve. Open the tap until it stops.
  2. Unscrew the three vertical housings with the spanner from the original box. Have a towel under them.
  3. Sediment in housing one, GAC in housing two (gasket up), carbon block in housing three (gasket up).
  4. Check the O-rings are seated, hand-tighten, open the feed, check for drips.
  5. Open the tank valve and run the tap for five minutes. Grey water is carbon fines, harmless.

What is not in it

The membrane, the post-carbon and the re-mineraliser. Those are yearly or longer and come in the full service kit. Buy this kit twice a year and the full kit when the membrane is due.

Questions

Before you buy.

Guides

Read before you buy.

4 min read

How often should you change water filter cartridges in South Africa?

Six months is the number for most cartridges on municipal water, and shorter on a borehole. The full table by stage and water source, and the signs that bring a change forward.

4 min read

Which replacement cartridges fit my RO system? The 10 inch standard explained

Measure the cartridge, not the brand. Nearly every under-sink RO sold in South Africa takes the same 10 inch cartridges and the same membrane. How to check in a minute.

5 min read

How to change the filters on a reverse osmosis system, in fifteen minutes

Three cartridges, one spanner, a bowl and fifteen minutes. The order they go in, the two things people get wrong, and the calendar that keeps the membrane alive.

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