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Quick Change | 5 Stage Reverse Osmosis | Full Water Filter Cartridge Replacement Pack (1-11EQ5-FULL)

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Quick Overview
  • Full Filter Pack for GT1-LSRO-EQ5AN Quick Change RO System
  • Includes Membrane
4 Interest Free Payments of $73.75

Quick Change | 5 Stage Reverse Osmosis | Full Water Filter Cartridge Replacement Pack (1-11EQ5-FULL)

  • Stage 1- 1x 1uM Dirt Sediment Filter (ST-01)
  • Stage 2- 1x GAC Filter (ST-33)
  • Stage 3- 1x 5uM Carbon Block (ST-CTO)
  • Stage 4- 1x 50 GPD RO Membrane (ST-RO50)
  • Stage 5- 1x GAC Coconut Carbon/Alkalising Post Filter (ST-34) OR Mixed Bed Deionising Resin (DI) (GT4-55-DI) (For RO/DI Systems Only)

Stage 1: The 1 Micron Sediment Cartridge (2-46-1 ST-01) (Replace Every 6 Months)

The first stage is a 1 Micron (uM) Sediment filter composed of 100% melt-blown polypropylene fibre. This cartridge helps to help protect the carbon pre-filters and reverse osmosis membrane from physical damage caused by particulate matter such as sand, dirt, silt, plant spores, and pollen. Physical contaminants such as these (which can surprisingly be found in most municipal water supplies), tend to clog up filter system components causing reduced water flow, lower osmotic pressure, diminished filtration efficiency, and ultimately, inferior water quality. Changing this filter every 6 months is vital!

Stage 2: The Granular Activated Carbon (GAC) Pre-Filter Cartridge (4-55-GAC ST-33) (Replace Every 6 Months)

The second stage is a high-grade granular activated carbon pre-filter. This type of loosely-packed carbon enables a high level of water flow through the system, whilst "taking the first hit" to absorb harmful organic chemicals and contaminants. Keeping up with regular maintenance of this pre-filter (changing it every 6 months) helps to extend the life of all filters that come after it, including the reverse osmosis membrane.

Stage 3: The 5 Micron Coconut Carbon QC Cartridge (4-55-CTO ST-CTO) (Replace Every 12 Months)

The third stage is a 5-micron high-grade coconut carbon block pre-filter. Similar to the GAC filter, but with a unique carbon block matrix for maximum surface area and contact time, this special carbon cartridge takes the biggest load of contaminant removal, prior to the membrane. Replace every 12 months.

Stage 4: The Reverse Osmosis (RO) Membrane Cartridge (50GPD Filmtec) (13-RO50 ST-RO50) (Replace every 3 Years)

The RO membrane is the "engine room" of this high-performance system, where all the hard work of removing ultra-fine micro-particles, metal ions, and dissolved mineral salts takes place to achieve the maximum level of chemical and contaminant reduction, down to 0.0001 of a micron. Because Reverse Osmosis is such a fine level of filtration, it requires high osmotic pressure, which also explains why we use three pre-filters to help protect the membrane from getting clogged or internally damaged by fine particulate matter.

Stage 5: Dual Finishing Cartridge: Japanese Activated Coconut Carbon/Calcium Alkalising Post-Filter (4-55-ALK ST-34ALK) - (Replace Every 12 Months)

The last stage features the finest grade of Japanese activated coconut carbon to ensure the purest taste, which then passes through calcite (CaCO³) alkalising media to raise and buffer the final pH to between 7-8, without causing hardness. Note that upon installation, a new Calcium Alkalising cartridge may register an initial pH higher than 8, but it will quickly balance out.


Stage 5: (For RO/DI Systems Only) The Mixed Bed Deionising Resin (DI) Water Filter Cartridge For Demineralised Water, Low EC, Max Total Dissolved Solids (TDS) Reduction (GT4-55-DI)

Creates RO/DI water for Dental, Medical, Cosmetic, Gardening, Hydroponic, Aquaponic, Aquarium & Brewing applications. Depending on how much water you use, you may wish to change this cartridge on a 6-monthly basis. The final stage features a Virgin Mixed Bed Deionising Resin, composed of highly purified acid cation and base anion resin that creates a higher level of purity than using RO filtration alone. Note that the higher the TDS of the incoming feedwater, the higher the residual percentage of TDS that will be left post-filtration by the RO. Thus, the purpose of the DI filter is to "polish" the water and pick up any residual TDS (salts) left. This cartridge produces consistent results where the highest quality of pure water is required, with minimum ionic and non-ionic contamination.

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.