PSI 021-Alka 5-Stage Reverse Osmosis System – Ionised Alkaline Water
Introducing the latest addition to our reverse osmosis system range – the PSI 021-Alka. This 5-stage system includes a PI cartridge, delivering water with a pH of ~8.5 for superior hydration. Assembled in Australia using high-quality components sourced from the U.S., U.K., and New Zealand.
Why Choose This System?
The PSI 021-Alka provides advanced ionised alkaline water that hydrates deeply and helps balance body pH. It adds beneficial minerals like Calcium, Potassium, and Magnesium to support overall wellness.
- Ionised alkaline water — pH ~8.5 for high hydration and neutralising acidic conditions.
- Quality components — U.S., U.K., and New Zealand parts for reliability.
- DOW FilmTec membrane — 75 GPD (300 L/day) with excellent rejection rates.
- PI cartridge — balances pH and enriches water with essential minerals.
- Flush valve — prolongs membrane life by preventing calcium/salt buildup.
- NSF-certified — components meet stringent safety and performance standards.
How It Works: 5-Stage Filtration
- Stage 1 — Sediment pre-filter removes dirt, sand, and particulates.
- Stage 2 — Coconut carbon filter (Matrikx CTO) reduces chlorine, chemicals, and odours.
- Stage 3 — DOW FilmTec RO membrane removes 98–99% of fluoride, heavy metals, and dissolved impurities.
- Stage 4 — Alkahydrate PI cartridge re-mineralises and adjusts pH for alkaline water.
- Stage 5 — Post-carbon filter (Omnipure) polishes taste and removes residual organics.
System Specifications & Features
- Premium housings — QMP-300-HP (burst strength 575 psi / 4000 kPa).
- Membrane — 75 GPD FilmTec, 300 L/day production.
- Pressure limiting valve (PLV) — included for system protection.
- Minimum pressure — 40 psi (272 kPa), higher pressure boosts performance.
- Main unit size — 52 cm (H) × 42 cm (W) × 14 cm (D).
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) — typical for older homes with copper pipes to separate taps.
Storage Tank Options
- Standard — 9 L stainless steel tank (NSF certified).
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Alternative sizes:
- 4.2 L — 33.5 cm (H) × 20.5 cm ⌀
- 9 L — 39 cm (H) × 24 cm ⌀
- 12 L — 39 cm (H) × 29 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.
Maintenance & Replacement Cartridges
- Annual cartridge pack (ROCDU-02 CTO) — order here.
- RO membrane (3–5 years) — order here.
- Alkahydrate cartridge (12 months) — order here.
Warranty
This system is backed by a 5-year warranty for peace of mind. Built with premium components and tested for durability and performance. Covers defects in materials and workmanship under normal use — see full warranty terms for details.
