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Asprinn Reverse Osmosis RO Membrane Element 50 GPD/190 LPD | USA Made to Approx. 0.0001 Micron (GT13-59)

The Asprinn Reverse Osmosis Membrane element can produce up to 50 GPD/190 Litres Per Day with a 1:1 permeate (clean water) to concentrate (wastewater) ratio, when used with a 200CC Flow Restrictor (on the waste line) on Chlorinated Mains Water at 70 PSI/482 kPa inlet pressure. Ideal for the reduction of TDS and common municipal water contaminants such as Heavy Metals, Fluoride, Minerals and Salts. 

This RO Membrane component is Tested and Certified to NSF/ANSI Standard 58.

Inorganic Organic Rejection

This membrane is capable of contaminant reduction rates as follows:

  • Aluminum 98%
  • Adrazin Over 98%
  • Arsenic 98%
  • Aldrin Over 98%
  • Benzene Over 98%
  • Barium 95%
  • Chlorine Over 98%
  • Cadmium 95%
  • Chloroform Over 98%
  • Calcium 98%
  • DOT Over 98%
  • Chloride 95%
  • Dichlormethane Over 98%
  • Chromium VI 98%
  • Endrin Over 98%
  • Copper 98%
  • Fluoranthene Over 98%
  • Fluoride 95%
  • Herbicides Over 98%
  • Iron 98%
  • Lindane Over 98%
  • Lead 98%
  • Methoxychlor Over 98%
  • Magnesium 98%
  • PCB Over 98%
  • Manganese 98%
  • Pesticides Over 98%
  • Mercury II 85%
  • Perchloroethylene Over 98%
  • Nitrate 90%
  • Phenol Over 98%
  • Potassium 95%
  • Tannic Acids Over 98%
  • Selenium IV 95%
  • Toxaphene Over 98%
  • Silver 98%
  • Trichlorethlene Over 98%
  • Sodium 95%
  • Trihalomethanes Over 98%
  • Strontium 98%
  • Volatile Organic Compounds (VOCs) Over 98%
  • Sulphate 98%
  • Total Dissolved Solids 95%
  • Zinc 98%

Disclaimer from the Manufacturer: The use of this product in and of itself does not necessarily guarantee the removal of cysts and pathogens from water. Effective cyst and pathogen reduction is dependent on the complete system design and on the operation and maintenance of the system. Permeate from the first hour of operation should be discarded.


How does an RO membrane work?

Reverse Osmosis membranes filter down to an ultra-fine level of filtration - down to 0.0001 of a micron - which is the reason why RO membranes can filter out minerals, salts, and metals (unlike carbon). Because this level of filtration is so fine, RO membranes do eventually clog up over time. How long you will be able to get out of your RO membrane, depends on the consistency of your membrane pre-filter maintenance, along with the starting quality of your water.

Schematic diagram of the pores in a reverse osmosis membrane.
(Adapted from Geise, G.M., 2021, found in https://www.science.org/doi/10.1126/science.abe9741)

  • HARD WATER (water that is full of salts and minerals) takes a bigger toll on RO membranes than water that is SOFT (water with a low Total Dissolved Solids rating). Western Australia, South Australia, the Northern Territory, and Queensland tend to have hard water, along with those whose main source of water comes from a bore. Thus the quality of water of the area in which you live is ultimately what will determine how long you get out of your RO membrane.

Australian Water Hardness Map Guide


Is Pre-Filtration Required?

Please note that Carbon Pre-Filtration is recommended when using Reverse Osmosis Membranes with Chlorinated/Chloraminated or high-sediment water sources:

  • Pre-Filters serve the dual purpose of blocking sediment particles and removing chlorine, which both cause damage to the inside of the RO membrane in different ways:
    • Sediment particles physically damage the fine internals of an RO membrane, causing micro-tears that allow contaminants through to the "clean" side of the osmotic membrane, as well as blocking up the membrane which can cause the system to stop producing water and force an excessive amount of water to waste. 
    • Chlorine that has been dissolved in water creates corrosive hypochlorous and hydrochloric acids, which dissolve the delicate RO membrane (via a process called "ring chlorination" which disrupts the hydrogen bonding between the membrane's polymer matrix) and allows contaminants to pass through to the "clean side". Because this process occurs gradually over time, most people don't notice the taste of contamination until they change their membrane!



Is Post-Filtration Required?

Post-Filters go after the RO membrane to condition the water for final use.

  • Pure RO water is typically acidic, and in some cases, pure RO water is used for brewing or in aquariums.
  • Some users require "Zero TDS" in which case a DI Resin Post-Filter will be placed after the membrane to strip out any residual TDS.
  • To boost the pH for consumption, carbon post-filtration is often used on its own to produce weak acid or pH-neutral water (as well as imparting a sweet flavour).
  • Carbon is often used in combination with mineral media such as Calcite to produce pH-neutral to alkaline water, or with Magnesium and Potassium to produce alkaline to high alkaline water.


This filter is used in the following FSA Filter Systems:

More Information
Product TypeWater Filter Cartridge

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.