PSI 021-Alka 5-Stage Reverse Osmosis System – Ionised Alkaline Water
Now proven to reduce PFAS (including PFOA) up to 99.9% when properly maintained.
Meet the newest member of our RO range: PSI 021-Alka. Built in Australia from premium U.S./Taiwan components, it pairs a genuine FilmTec 75 GPD (~300 L/day) membrane with an Alkahydrate PI stage to lift pH to around ~8.5 and add beneficial minerals (Ca/Mg/K) for a smoother taste. A chlorine/chloramine-targeting pre-filter makes it ideal for Australian town water.
Why Choose This System?
- Ionised alkaline finish — typically ~pH 8–8.5 with a clean, rounded taste.
- FilmTec membrane — 75 GPD (~300 L/day) with excellent rejection.
- PI mineral cartridge — re-adds minerals and buffers pH.
- Flush valve — helps minimise scale build-up and extend membrane life.
- Certified & compliant — components to NSF/ANSI and Australian Standards.
- Optional alkaliser (alt media) — additional pH buffering if desired.
How It Works: 5-Stage Filtration
- Stage 1 — 1 µm sediment removes dirt, rust and sand to protect the carbon and membrane.
- Stage 2 — Coconut carbon block (Matrikx CTO) reduces chlorine/chemicals & odour to improve taste.
- Stage 3 — DOW FilmTec RO membrane removes ~96–99% fluoride, heavy metals & dissolved solids.
- Stage 4 — Alkahydrate PI cartridge re-mineralises and raises pH for alkaline water.
- Stage 5 — Omnipure post-carbon final polish for crisp, fresh taste; adsorbs residual organics.
PFAS Reduction & Water Quality
RO’s carbon → membrane → carbon sequence is highly effective at reducing a broad range of contaminants, including PFAS (e.g., PFOA). Most Australian supplies are ~pH 7–7.5; after the membrane, low mineral content can drop pH to ~6. The Alkahydrate PI stage buffers it back above 7 (typically ~8–8.5) for smoother, balanced water.
System Specifications & Features
- Premium housings — QMP-300-HP; burst strength ~575 psi (≈4000 kPa).
- Membrane — FilmTec 75 GPD (~300 L/day) production.
- Pressure limiting valve (PLV) — included for system protection/compliance.
- Minimum pressure — 40 psi (≈272 kPa); ideal ≥50 psi (350 kPa).
- 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 to the adapter’s ½″ male thread. Details/Instructions
- ¾″ Dishwasher Adapter — use the dishwasher cold-water outlet where no dishwasher is installed. Details/Instructions
- ½″ Tee Olive Fitting (Copper) — typical for older homes with copper pipes to separate taps. Cut 45–50 mm from the ½″ copper line, deburr, install the tee, then proceed with the standard PLV/tubing steps. Details/Instructions
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 ⌀
- TANK DATA SHEET
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.
Performance Data
The system demonstrates high contaminant removal rates across both inorganic and organic compounds:
Inorganic
- Aluminum 99%
- Arsenic 98%
- Arlum 95%
- Cadmium 95%
- Calcium 98%
- Chromium III 98%
- Copper 90%
- Fluoride 98%
- Iron 98%
- Lead 90%
- Magnesium 98%
- Manganese 90%
- Mercury II 85%
- Nitrate 90%
- Potassium 95%
- Selenium 95%
- Silver 98%
- Sodium 95%
- Strontium 90%
- Sulfate 90%
- Zinc 98%
- Total Dissolved Solids 95%
- Asbestos 99%
Organic
- Chlorine 98%+
- Herbicides 98%+
- Pesticides 98%+
- DDT 98%+
- Endrin 90%+
- Lindane 98%+
- Aldrin 98%+
- Benzene 98%+
- VOCs 98%+
- Atrazine 98%+
- Fluoranthene 98%+
- Phenol 98%+
- Trihalomethanes 98%+
- Toxaphene 98%+
- Dichloromethane 98%+
- Chloroform 98%+
- Trichloroethylene 98%+
- Perchloroethylene 98%+
- Tannic Acid 98%+
- Methoxychlor 98%+
- PCB 98%+
Performance Data Sheets
- Membrane — DATA SHEET
- Sediment — DATA SHEET
- Pre-Carbon (CTO) — DATA SHEET
- Post-Carbon — DATA SHEET
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.
