5 Stage Standard Reverse Osmosis System

Under-sink water filtration

5 Stage Reverse Osmosis Water Filter.

An under-sink reverse osmosis system with a storage tank, a dedicated drinking-water tap and a final carbon polishing stage.

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Filtered Water Solutions standard 5 Stage Reverse Osmosis filter and storage tank
  • Under-sink reverse osmosis
  • Final carbon polishing
  • Dedicated filtered-water tap

Filtration at a glance

5 stage RO filtration

Three pre-filters prepare the water for reverse osmosis. A final carbon cartridge polishes taste and odour before the water reaches your dedicated drinking-water tap.

Taste and odour

  • Unwanted tastes
  • Unwanted odours

Sediment and particles

  • Sediment
  • Dirt and rust

Carbon pre-treatment

  • Chlorine reduction
  • Preparation before the membrane

Reverse osmosis membrane

  • RO membrane filtration
  • Selected dissolved substances

Final treatment

  • Final carbon polishing
  • Taste and odour finish

For a specific contaminant, ask for the supplied model’s performance data and rated capacity. Results depend on the system, incoming water and maintenance.

How it works

Product configuration

Follow the 5 filtration stages in order. The storage tank holds the RO water before the finishing treatment and dedicated tap.

5 Stage Standard RO · stage order

  1. 1Sediment
  2. 2First carbon
  3. 3Second carbon
  4. 4RO membrane
  5. 5Carbon polish

Cold supply → three pre-filters → RO membrane → storage tank → final carbon polish → drinking-water tap

The membrane also sends a separate concentrated water stream to the drain. The numbered stages match the descriptions below.

Stage 1

Sediment filtration

Catches suspended particles such as dirt and sand.

Stages 2–3

Carbon filtration

Two carbon stages help reduce chlorine, taste and odour before the reverse osmosis membrane.

Stage 4

Reverse osmosis membrane

Filters selected dissolved substances. Ask our team for performance data for this model.

Stage 5

Final carbon polishing

Finishes the water for taste and odour before it reaches the dedicated tap.

Your questions, answered.

Ask our team about the system and installation.

How does it differ from the alkaline model?

This model finishes with carbon polishing. The 5 Stage Alkaline system uses a mineral finishing cartridge.

How is it installed?

The system sits beneath the kitchen sink. Call our team and we’ll ask a few questions about your setup to work out what installation involves.

When do the filters need replacing?

Replacement intervals depend on the cartridge, water quality and use. Contact our servicing team for the schedule for your system.