Aquabest Duo Water Purifier
5-stage reverse osmosis · 75 GPD · With / without pump · Inlet and outlet water TDS reading
Compact 5-stage under-sink reverse osmosis water purifier. Mains water passing through the pre-filters, the membrane and the final carbon filter becomes clean, great-tasting drinking water.
- Capacity
- 75 GPD (284 L/day)
- Filtration
- 5 stages
- Tank
- 8 L metal (2.2 gal)
- Pump
- With / Without
Stock codes3-05-AB-DUO3-05-AB-DUO-P
Overview
The digital display on the front panel provides inlet and outlet water tds reading and runs on 2 AA batteries. The unit is available with or without a pump to suit the mains pressure.
Features
- 5-stage reverse osmosis filtration
- Easy filter change with quick-connect fittings
- Inlet and outlet water TDS reading, digital display
- Available with or without pump
- Compact housing in white or black
Applications
- Drinking and cooking water at home
- Under-sink kitchen installations
- Offices and small businesses
- Treatment of mains water
Digital Display
- Inlet water TDS reading
- Outlet water TDS reading
- Digital display powered by 2 AA batteries
- Plug-in or fixed display (optional)
Optional Alkaline Water Stage
A 2" inline alkaline filter fitted as an optional extra stage adds minerals such as calcium and magnesium to the reverse osmosis water and raises its pH to about 8.5 or above, giving a softer taste. Specify when ordering.
Filtration Stages
Mains waterEnters the unit from the cold water line through the feed valve.Inlet- 01
2.5" Inline Sediment 5 µm (Quick-connect)Retains sand, rust and sedimentReplace: 6 - 12 months - 022.5" Inline GAC Carbon (Quick-connect)Reduces chlorine, taste and odourReplace: 6 - 12 months
- 032.5" Inline CTO Carbon (Quick-connect)Reduces residual chlorine and organicsReplace: 6 - 12 months
- 04
75 GPD Membrane FilterSeparates dissolved salts and contaminantsReplace: 12 - 24 months - 05
2" Inline Post Carbon (Quick-connect)Polishes taste and odour as the final stageReplace: 6 - 24 months 
Purified waterPurified water is delivered to the faucet, ready to use.Outlet
| Stage | Filter | Function | Replace |
|---|---|---|---|
| Stage 1 | 2.5" Inline Sediment 5 µm (Quick-connect) | Retains sand, rust and sediment | 6 - 12 months |
| Stage 2 | 2.5" Inline GAC Carbon (Quick-connect) | Reduces chlorine, taste and odour | 6 - 12 months |
| Stage 3 | 2.5" Inline CTO Carbon (Quick-connect) | Reduces residual chlorine and organics | 6 - 12 months |
| Stage 4 | 75 GPD Membrane Filter | Separates dissolved salts and contaminants | 12 - 24 months |
| Stage 5 | 2" Inline Post Carbon (Quick-connect) | Polishes taste and odour as the final stage | 6 - 24 months |
| Stage | Filter | Function | Replace |
|---|---|---|---|
| Optional | 2" Inline Alkaline Filter | Adds alkaline minerals and raises the pH of the water | 12 months max. |
| Optional | 2" Inline Mineral Filter | Adds minerals and improves taste | 12 months max. |
| Optional | 2" Inline BioCeramic Filter | Additional final stage with bioceramic balls | 12 months max. |
Replacement intervals are typical values and depend on water quality and usage.
Technical Specifications
Operating Conditions
- Feed pressure (no pump)
- 3 - 7 bar
- Feed pressure (with pump)
- 0.2 - 7 bar
- Feed water temperature
- 5 - 38 °C (41 - 100 °F)
- Feed water TDS
- Max. 500 ppm
- Feed water pH
- 3 - 11
- Hardness
- Max. 20 °F
- Pump supply
- 24 V DC (via adapter)
Materials and Construction
- Stock code
- 3-05-AB-DUO (pompasız) · 3-05-AB-DUO-P (pompalı)
- Tank
- 8 L metal tank (2.2 gal)
- Faucet
- Luxury faucet
- Connection
- Quick-connect, 3/8" feed adapter
- Valve
- Shut-off valve
- Unit size
- 250 × 440 × 430 mm
- Display
- Inlet and outlet water TDS reading (2 × AA)
- Warranty / service life
- 2 years / at least 10 years
Installation and Maintenance
- Shut the cold water valve; fit the connection kit (feed adapter) to the cold water line.
- Drill the worktop first with a 5 mm, then a 12 mm bit and mount the faucet.
- Place the membrane in its housing; cut the 1/4" tubing into three and connect the inlet, faucet and drain lines.
- Open the valve (plug in the adapter on pump models); wait 1 hour for the tank to fill.
- Drain the first tank through the faucet; once it refills, the unit is ready for use.
Do not connect the unit to hot water (above 40 °C). Pressure: below 3 bar use the pump model or a pump kit; above 7 bar fit a pressure reducer at the inlet. Replace the filters at least once a year; if unused for over a month, close the valve and empty the tank.
Packaging and Loading
| Version | Box Size (mm) | Box Weight |
|---|---|---|
| No pump | 260 × 515 × 440 | 9.25 kg |
| With pump | 260 × 515 × 440 | 10.85 kg |
| Vehicle | Pallets | Boxes / Pallet | Palletised | Loose |
|---|---|---|---|---|
| 20' Container | 10 | 30 | 300 pcs | 495 pcs |
| 40' DC Container | 20 | 30 | 600 pcs | 1,035 pcs |
| 40' HC Container | 20 | 30 | 600 pcs | 1,242 pcs |
| Curtain-side Truck | 26 | 30 | 780 pcs | 1,404 pcs |
Compatible Filters
Standard replacement filters for this unit. Other filters that fit, including optional extra stages, are listed under Optional filters.
| Stock Code | Filter | Size | Connection | Filter type | |
|---|---|---|---|---|---|
| 6-25-PP-S | Star Inline Sediment Filter | 2.5" | Quick-connect | Sediment | |
| 6-25-GAC-S | Star Inline GAC Filter | 2.5" | Quick-connect | GAC Carbon | |
| 6-25-CTO-S | Star Inline CTO Filter | 2.5" | Quick-connect | CTO Carbon | |
| 3-1-1-ROM75 +1 | 1812 RO Membrane | 1812 | - | RO Membrane | |
| 6-20-POST-Ç | 2" Quick-Connect High Iodine Post Carbon Filter | 2" | Quick-connect | Post Carbon |
Optional filters (32)
Wholesale and OEM
Request a quote and lead time for this product
We quote distributors, installers and project contractors by stock code. Ask us about OEM and private label production as well.
