Put the minerals back into your RO water

Reverse osmosis is highly effective at reducing dissolved contaminants and impurities, but in doing so it also removes many of the naturally occurring minerals found in water.

The Direct Water Filters 3-in-1 Mineral Cartridge is designed as a final-stage polishing cartridge for reverse osmosis systems, helping to remineralise and condition purified RO water while improving its taste and overall drinking quality.

Using a carefully selected combination of three filtration and conditioning media, this compact inline cartridge provides three functions in one convenient unit — making it an ideal upgrade for domestic RO drinking-water systems.

Why use a mineral cartridge after RO?

RO water can have a very low mineral content and may taste noticeably different from normal drinking water. Passing the purified water through the 3-in-1 cartridge before it reaches the drinking-water tap provides a final conditioning stage.

The cartridge is designed to add beneficial mineral content back into the water, while providing additional polishing and conditioning to produce more pleasant-tasting finished water.

Key benefits include:

• 3-in-1 multi-stage media – combines three water-treatment functions in one cartridge
• Remineralises RO water – helps restore mineral content following reverse osmosis
• Improves taste – provides a final polishing stage for fresher, more pleasant drinking water
• Conditions purified water – designed specifically for low-mineral RO water
• Compact inline design – easy to incorporate into new or existing RO systems
• Simple installation – ideal as the final stage between the RO system/storage tank and drinking-water tap
• Ideal RO upgrade – a simple way to improve the finished quality of reverse-osmosis drinking water

How it works

The cartridge contains three separate treatment media, with the water passing progressively through each section. Each media performs a different role, combining filtration, mineralisation and conditioning within a single compact cartridge.

For most installations, the cartridge is fitted as the final treatment stage, allowing already-purified RO water to pass through the mineral media immediately before dispensing.

Typical installation:

RO Membrane → RO Storage Tank → 3-in-1 Mineral Cartridge → Drinking Water Tap

For direct-flow RO systems, it can be installed in the final product-water line after the main purification stages.

Ideal for

The 3-in-1 cartridge is suitable for domestic reverse osmosis systems, under-sink RO units, drinking-water purification systems, direct-flow RO systems and other applications where purified water requires final-stage mineralisation and conditioning.

A simple finishing stage that can make a noticeable difference to your RO drinking water.

FILTER • MINERALISE • CONDITION

Cleaner, better-tasting RO water — with the finishing touch it deserves.