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AUSTRALIAN OWNED & OPERATED
Licenced WaterMark Supplier
WaterMark Twin Undersink Water Filter System | 5 Micron Sediment + 1 Micron Coconut Carbon Filters | White Bracket + Tap (GT1-46W)
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Twin 10" x 2.5" housings with full fitting kit and tap
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Includes 5 micron sediment + 1 micron coconut carbon filters
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WaterMark Certified housing and pressure limiting valve
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NSF/ANSI 42 compliant filters
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Leak shut-off valve and black-handle faucet included
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Suitable for mains or tank water systems
Twin Undersink Water Filter System - (GT1-46WM)
This Twin Undersink Water Filter System delivers reliable two-stage filtration for homes on either mains or rainwater supply. Designed for performance and simplicity, it offers an excellent foundation for improving the taste, clarity, and quality of your drinking water — all in a compact, undersink-friendly format.
The system includes a 5 micron polyspun gradient sediment filter followed by a 1 micron 100% coconut carbon block, both manufactured by High Performance Filtration (HPF). These filters work together to reduce dirt, rust, chlorine, taste, odour, and volatile organic compounds (VOCs), helping ensure safe, pleasant-tasting water straight from the tap.
Filter 1: Gradient Polyspun Sediment Filter – 5 Micron PP2510-05 (GT2-2K)
Installed as the first stage, this three-layer depth filter uses a true gradient structure (20µm → 10µm → 5µm) to trap sediment efficiently across multiple layers. Larger particles are caught in the outer layer, while finer sediment is captured deeper within the matrix — improving filter longevity and protecting downstream components.
Ideal for reducing rust, silt, dirt, and scale, it performs well on both mains and tank water supplies and enhances the performance of the carbon stage that follows.
Filter 2: 100% Coconut Shell Carbon Block – 1 Micron CTO2510-01 (GT4-6CTO)
The second stage is a 1 micron activated coconut carbon block, made exclusively from 100% coconut shell carbon for high adsorption efficiency and low pressure drop. This filter is designed to remove chlorine, taste, odour, and a wide range of chemical residues.
It has been tested in accordance with NSF/ANSI 53 for VOC (Volatile Organic Compound) reduction by the Water Quality Association (WQA), confirming its effectiveness as a Point-of-Use Drinking Water filter. Free of coal-blend fillers, this HPF filter provides high-performance chemical reduction with excellent flow characteristics.
Kit Contains
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2 × 10" x 2.5" WaterMark Certified Filter Housings (GT8-14)
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1 × 5 Micron Gradient Polyspun Sediment Filter (GT2-2K)
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1 × 1 Micron Coconut Carbon Block Filter (GT4-6CTO)
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1 × White Powder-Coated Steel Mounting Bracket
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1 × GT9-0S Chrome Flick Tap with Black Handle
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1 × WaterMark Approved Pressure Limiting Valve (350 kPa)
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1 × Leak Shut-Off Valve
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1 × Feed Water Valve
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Tubing, Push-Fit Connectors & Housing Spanner
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Comprehensive Installation Instructions
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Optional Tap Upgrade: Additional Styles &/Or 3-Way Mixer Tap (charges apply)
WaterMark Certification
This system is WaterMark Certified to AS 3497:2021 under Certificate Number 23247 – the mandatory certification standard required for any water filter system installed by a licensed plumber in Australia.
WaterMark certification ensures compliance with Australian plumbing regulations, confirming that all materials and fittings meet strict safety and quality standards. Systems are assembled in Australia and undergo batch testing to ensure consistent performance and durability.
Certification covers structural pressure integrity and requires all components — including filters — to comply with relevant health-based standards such as NSF/ANSI 42 or higher.
⚠️ Beware of non-certified systems – uncertified installations may pose health risks and could invalidate home insurance under Australia’s Plumbing and Drainage laws.
Installation Note:
This system must be installed by a licensed plumber in accordance with AS 3497. Full installation instructions are included in the box.
| Specification | Details |
|---|---|
| System Dimensions | 36 × 24 × 13 cm (H × W × D) |
| Micron Rating | 5 Micron (Sediment) + 1 Micron (Carbon) |
| Filter Media | Polyspun (Sediment), Coconut Carbon (Carbon Block) |
| Ports | 1/4" |
| Fittings | 1/4" Push-Fit |
| Max Flow Rate | 3 L/min* |
| Compatible Water Types | Mains / Town Water / Rainwater (Tank) |
| Installation | Undersink (Bracket Mount) |
| Standards | AS 3497, AS 4020, AS 3707 |
| Certifications | WaterMark Certified, NSF/ANSI 42 & 53 Compliant |
| Maximum Pressure | 500 kPa (PLV Limited to 350 kPa) |
| VOC Reduction | >95% (Tested to NSF/ANSI 53 – WQA) |
| Chlorine Reduction | 30,000 L @ 3.78 L/min |
*Flow rate will vary based on inlet pressure, water temperature, and filter condition.
Return Policy
Due to the nature of the products we sell, a strict return policy is in place. We work with food grade certified materials that must be un-opened and un-used as to be able to be re-sold.
You may receive a refund or credit of equal amount, less the restocking fee if applicable and any other deductions that are relevant.
- Wrongly purchased items may be returned for a merchandise credit, this applies for but not limited to: Wrong size, wrong system etc.
- 30 Day return Policy: Returns will not be accepted without prior approval or after 30 days of invoice date.
- All returns will incur a 17.5% restocking fee or cost to send the item to you whichever greater. FSA may use discretion to determine the restocking fee.
- Any damages (minor, that can be repaired) will incur a fee which will be deducted from the total refund which will be equal to the cost of the replacement
parts (List Price) and labour charge (if applicable) to repair the system(s). This will be separate to the restocking fee. - Any damage considered to be major and not feasible for repair may be refused and the return request will be void. The customer will be responsible for the return freight or disposal of the damaged unit.
- Return shipping is to be paid by the buyer to the address provided. It is recommended that the customer applies transit warranty to the return freight in case of damage.
- Any damages to the system that were not reported to FSA within 48 business hours of receipted delivery are not covered under our transit warranty.
- Should the item appear faulty or doesn’t work how described, the unit/item must be returned for testing (if requested), the return postage paid by the buyer. If the unit/item is deemed to be faulty, compensation will be provided for the postage cost (Proof of cost required). If the unit/item is deemed to be in working order and as described, the buyer will responsible for return postage.
If you have any questions about our return policy, please contact us before purchase. This will also help to ensure you purchase the correct product that suits your requirements.