Key Features

• 5-stage filtration — comprehensive purification with taste-polish and mineral restore.
• Hi Alkaliser re-mineraliser — raises pH (~8.5–9.5), adds Ca/Mg/K, and oxygen-enriches output.
• Low waste ratio (~1:1) — efficient water usage with flush technology.
• High output — DOW FilmTec ~300 L/day @ 50 psi; can reach ~450 L/day at higher pressure.
• Compact under-sink install — dedicated lead-free faucet included.
• Pressure limiting valve — included for system protection.
• NSF-certified components — compliant with Australian Standards.

5-Stage Filtration Process

• Stage 1 — Sediment pre-filter removes dirt, sand & particulates.
• Stage 2 — Carbon block reduces chlorine, chemicals & odours.
• Stage 3 — DOW FilmTec RO membrane reduces dissolved salts and contaminants (e.g., fluoride, heavy metals, nitrates).
• Stage 4 — Post-carbon polish enhances taste and reduces residual organics.
• Stage 5 — Hi Alkaliser re-mineraliser raises pH, adds minerals, oxygen-enriches for fresh mouthfeel.

Hi Alkaliser Re-Mineraliser Details

This refillable final stage restores healthy properties often reduced by RO, using a proprietary blend of mineral media to:

• Lift pH to around 8.5–9.5 (source water dependent).
• Add back calcium, magnesium, potassium — minerals found in natural spring water.
• Oxygen-enrich the water for a smoother mouthfeel.
• Improve taste by balancing residual acidity.
• Support electrolyte balance for everyday hydration.

Refillable & eco-friendly: replace media about every 24 months. Rated up to 10,000 L of treated water; a flow restrictor optimises contact time for mineral uptake.

System Specifications

• Membrane capacity — ~300 L/day @ 50 psi (350 kPa); up to ~450 L/day at higher pressure.
• Waste ratio — ~1:1 (efficient water usage).
• pH output — typically 8.5–9.5 with Hi Alkaliser (source-dependent).
• Operating pressure — minimum ~40 psi (280 kPa); optimal ≈ 50 psi (350 kPa).
• Main unit size — ~42 cm (H) × 35 cm (W) × 14 cm (D).
• Pressure limiting valve — included; WaterMark compliant.
• Components — NSF-certified, built to Australian Standards.

Connection Types

• ½″ Flick-Mixer Braided Line — most common in modern kitchens. Fit the supplied adapter with the rubber washer, then re-attach the braided hose.
• ¾″ Dishwasher Adapter — use the dishwasher cold-water outlet where no dishwasher is installed.
• ½″ Tee Olive Fitting (Copper) — common in older homes with separate taps & copper lines.

Storage Tank Options

• Standard — 9 L stainless steel tank (NSF certified).
• Alternative sizes:
  • 4.2 L — 33 cm (H) × 20.5 cm ⌀
  • 9 L — 39 cm (H) × 24 cm ⌀
  • 12 L — 39 cm (H) × 27.5 cm ⌀

Faucet Options

Bundle & save: upgrading your faucet with the system is cheaper than buying it later.

Browse Faucet Range, then select your choice from the Faucet Option dropdown above. Fits most sink/benchtop holes (12–13 mm) and standard thicknesses.

Replacement Cartridges & Maintenance

• Annual cartridge pack (ROCDU-02) — order here.
• RO membrane (~4 years) — order here.
• Re-mineraliser / alkaliser (~2 years) — order here.

Additional Information

Cartridge replacement tutorial

Helpful Resources

• Reverse osmosis storage tanks — details
• Waste ratios explained — learn more
• Mains connection install guide — how each adapter is installed
• Warranty (5 years) — see terms
• Selection advice — which system suits me?
• Membrane treatment rates (PDF) — download

Warranty

The PSI-021-5RM-HA comes with a 5-year warranty covering defects in materials and workmanship under normal use. Built with top-grade components for durability and reliable performance — see full warranty terms for details.