Triple pH Neutral + 0.1 Micron Ultra Fine Cyst Parasite + Bacteria Reduction Undersink Water Filter

This Undersink Water Filter System is purpose-built for homes using rainwater or untreated tank water, combining fine particle and bacterial protection with a final stage that helps neutralise acidic pH often present in stored water.

Featuring three standard 10" x 2.5" filters in a compact bracket-mounted housing, the system also includes a fourth inline remineralising filter, installed above the bracket, which uses calcite and granular activated carbon (GAC) to elevate and stabilise the pH after filtration. This ensures more balanced, palatable water at the tap.

Each filtration stage plays a distinct role in reducing sediment, bacteria, taste and odour, while the inline cartridge helps prevent the mildly corrosive characteristics sometimes found in low-mineral water — especially important for older pipework or metal fittings.

Assembled using WaterMark Certified housings and supplied with all plumbing components required for a licensed install, this system offers a smart, high-quality solution for households looking for peace of mind when relying on harvested water.

Filter 1: 5 Micron Polyspun Sediment Filter

The first stage is a depth-melted polyspun filter designed to trap larger sediment, rust and debris. It helps prevent clogging and fouling of downstream filters while maintaining good system flow.

Filter 2: 0.1 Micron Multi-Layer Bacteria Filter

This advanced absolute-rated filter incorporates pleated outer layers, a carbon block core, and a hollow fibre membrane rated to 0.1 micron. Independently tested to ASTM F838-15, it provides Log8 (99.999999%) reduction of E. coli and P. aeruginosa — ideal for untreated tank water. It is compliant to NSF/ANSI 42 and 53 (Cyst), FDA and EU food-grade standards.

Filter 3: 5 Micron Silver-Impregnated Carbon Block (HPF)

The third stage is a 5 micron coconut carbon block enhanced with silver. It adsorbs organic odours and taste compounds, improving the flavour of stored rainwater. The silver helps discourage microbial growth inside the filter, which can otherwise occur in low-chlorine environments.

Inline Remineralising Filter: Calcite + GAC

The final stage is an inline cartridge that combines calcite media with granular activated carbon. As water passes through, calcite slowly dissolves to elevate and stabilise the pH, counteracting the natural acidity of rainwater and improving its palatability and compatibility with plumbing.

This is particularly useful in areas where rainwater has a pH below 6.5 — helping to reduce corrosion risk and scale the water closer to neutral, without excessive alkalinity or added chemicals. The GAC also provides a final polish, reducing any residual taste or odour from the tank or plumbing system.

Kit Contains

• 3 × 10" x 2.5" WaterMark Certified Filter Housings

• 1 × 5 Micron Polyspun Sediment Filter

• 1 × 0.1 Micron Multi-Layer Absolute Bacteria Filter (ASTM F838-15 tested)

• 1 × 5 Micron Silver-Impregnated Coconut Carbon Filter (HPF)

• 1 × Inline Calcite + GAC Remineralising Cartridge

• 1 × White Powder-Coated Steel Mounting Bracket

• 1 × Modern Chrome Faucet Tap

• 1 × WaterMark Approved Pressure Limiting Valve (500 kPa)

• 1 × Leak Shut-Off Valve

• 1 × Feed Water Valve

• Tubing, Push-Fit Connectors & Housing Spanner

• Comprehensive Installation Instructions

• Optional Tap Upgrade: 3-Way Mixer Tap (charges apply)

WaterMark Certification

This system is WaterMark Certified to AS 3497:2021 under Certificate Number 23247, ensuring suitability for installation by licensed plumbers in Australia. WaterMark certification covers pressure durability, material safety, and compatibility with certified filters.

All filter cartridges included in this system are compliant with relevant NSF/ANSI 42 and 53 performance and material safety standards.

Installation Note:
This system must be installed by a licensed plumber. Full instructions are included.