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Whole House Bore Water Filter System 20" 4.5" UV + Hard Water Conditioner (1-9TWM, 7-9K & 31-1020 x2)

GT1-9TWM GT7-9K GT31-1020 x2
In stock
4 Interest Free Payments of $392.50

WaterMark Certified Whole House Water Filter

This Water Filter System is certified to WaterMark Standards AS/NZS 3497 under Certificate Number 23247.

WaterMark Certification is the level of certification required by law for a licensed plumber in Australia to install a water filter system. All products used under this certification will give you peace of mind, knowing that your water filter complies with Australian plumbing codes.

Our WaterMark Certified filter systems are hand-assembled here in Australia and are randomly batch tested to ensure top quality and workmanship for your water filtration products.

System Contains

  • 3x WaterMark Certified Big Blue Housings - Affixed to White Steel Bracket
  • 1x 5 Micron NSF Pleated Washable Filter
  • 1x 5 Micron NSF polypropylene spun sediment filter
  • 1x 5 Micron Pure Carbon Block Filter
  • 3x 1/4" Bung/Stoppers for pressure gauge ports
  • 1x 50L/Min GT7-9K UV System + Components
  • 2x GT31-1020 Fluid Reactors
  • 1x Opening Spanner
  • Instructions

The carbon filter included with this system is our TOP OF THE LINE PURE CARBON BLOCK FILTER, made with 100% pure Coconut Carbon (not a coal/carbon blend), for smoother, sweeter tasting water.

This system uses a standard 20" housing, offering you the flexibility to mix and match the type of cartridges you wish to use.

This kit has been put together to meet the demands of many customers using tank water in conjunction with bore water.

Bore water will always require filtration as it isn't treated like municipal water supplies. Thus, the most cost-effective and total solution is to use UV Sterilisation, which will ensure 100% eradication of all bacteria and viruses from your house water supply.

The only alternative would be to use an undersink filter for drinking water, which is effective at stopping cysts such as giardia, but won't protect you from harmful bacteria or viruses such as E-Coli which can enter the water through frog excrement. On top of this, all other taps (i.e the shower, basins, and other taps) won't be treated, so you can still be exposed to these viruses and bacteria through other means other than ingestion.

PLEASE NOTE: The second photo in this listing is an example photo only. Not all items included in the photo are supplied with this kit - you will only receive the items that are listed above. You will need to source your own fittings in order to install the system to your required specifications. Because all setups are different, we do not supply the fittings with this kit. Please refer to the description for items supplied with this kit.

The UV ballast is not waterproof and should be protected from water/moisture at all times.

If you have any questions at all regarding the installation or the included items/added extras, please contact us prior to purchasing.

We are bore water specialists and aim to provide you with the most accurate recommendation for your water supply. This system is not always a "total fix", as there are many different factors to consider when using bore water. We recommend that you get your bore water tested to determine the different salt and mineral levels and to see if there are any underlying issues before you purchase any water filtration. If you have not had your water tested and would like to get it done, please contact us and we can organise to have your water analysed.

Magnetic Fluid Reactors - Water Conditioning


  • Hard Water Softening
  • Bore Water Solutions
  • De-Salt Garden Soils
  • Prevents Leaf Burn
  • Stimulate Plant Growth - See Testimonials in Additional Documentation
  • Hydroponic Water Treatment
  • Scale Reduction / Prevention in Water Pipes
  • Stimulate Better Livestock Water Consumption

The Fluid Reactor can help with a range of water quality issues. Units will change the properties of any liquid passing through them, and result in numerous beneficial changes. 
Pipes and hoses will have less build-up, cattle are more likely to drink treated water, and crops produce a better yield. 


  • No power required
  • No power connection
  • No Costly down-time
  • Continuous operation
  • No salt softeners
  • No re-current expenditure
  • Maintenance-free - Scale free
  • Corrosion-free

Install the Fluid Reactor for maximum product performance No chemicals - Excellent for the environment 

How do fluid reactors work? 

High performance, magnetic energy is focused into the pipe carrying the fluid as it passes. 
Magnetic energy is transmitted to the water. This forces a physical and potential change to occur within the water. 
The calcium in the water and other like-minerals are prevented from crystallizing or causing scale deposits. 

By magnetically locking the water, surface tension drops and the water becomes softer and performs better. The salts (chlorides & sodium) are reduced in intensity, thus changing the salty taste and behaviour of the water. 

This new Fluid Reactor is more powerful than other units on the market. It also emits a negative defusing technology down the pipe that provides for far greater magnetic saturation. 

The Fluid Reactor provides the most powerfully effective and very real weapon in reducing the effects of salinity in gardening and agricultural use. 

The Fluid Reactor is out-performing every other type of treatment device on the international market within the agricultural industry due to its ability to reduce the effect of salinity and soften extremely hard water. 

Pocket the savings, without recourse to expensive salt softeners. Help the environment. Enjoy maintenance-free, soft, scale-free water for life 

For years the Fluid Reactor Brand has been only available exclusively to our dealer network throughout Australia and Overseas. However, the year 2011 bought about a big change in the Magnetic Water Treatment industry. Cheaper imports and people running around selling water treatment devices without a shred of knowledge on water or magnetic water treatment have prompted these changes. 

These sellers have been making the fast bucks and leaving clients out of pocket with no real results, due to their poor execution and lack of knowledge. To counter this problem, we've brought our range of Fluid Reactors down in price, making them readily available straight to the public.

It's essential that you receive the right advice pertaining to your situation and your water analysis, as there are no real blanket solutions to water treatment - and unfortunately for the average person, water treatment is technical and at times expensive.

We are a water treatment company with specialist Magnetic Water Treatment knowledge. We have testimonials and case studies to support our work over many years. If you have a water issue especially involving bore water, either for domestic gardens, commercial crops or scale build-up we invite you to contact us.

We are not here to merely sell you magnetic water treatment devices (MTD's) - we're here to solve your water problems.

This specific listing is for our Domestic Fluid Reactor System. It is a multi-fit unit to suit most pipe sizes from 12mm - 25mm and water with a TDS up to 600 ppm (pending the breakdown analysis). Water as high as 1200 ppm can also be treated by doubling this system (pending the break down analysis). However, as aforementioned, we will only recommend this type of system to you, after conducting a proper consultation regarding your specific water situation.

Triple Whole House Filter

Stage 1:  5 Micron NSF Pleated Sediment Filter

Big Blue" 20" x 4.5" Pleated Washable Sediment Filter Pleated filters carry a much larger surface area, therefore they are able to catch a lot more debris! Simply remove the filter clean and re-use!

Very popular for tank water when you have a lot of debris like leaves, dirt, or particularly after fresh rain. The washable pleats on this filter are designed to be washed and reinstalled. However, please consider that if you are using this system for drinking water, you must be careful not to over-use a pleated filter as it will gather bacterial contaminants and become smelly over time. If the sediment in your tank isn't all that bad, you might want to consider a cost-effective polyspun disposable filter, and simply replace it when dirty. This is also useful for bore water when you have a small amount of iron or manganese bacteria as it is easy and quick to clean.

Stage 2: 5 Micron NSF Polyspun Sediment Filter

Poly Spun is the best type of filtration you can get. They do not accumulate bacteria as much as other materials, as well as being high flow and low pressure drop. Effective in all applications. 5 micron is a reasonably fine filtration and would be suited on high quality bore water or town water or infront of RO's.

100% Virgin Polypropylene material - Compatible for Our Watermark Certified Systems

Purefer Polypropylene filters are made using a unique single nozzle manufacturing process, where a single nozzle blows melted polypropylene onto a spinning 5 micron filter core. As more Polypropylene is blown, the filter diameter gradually widens and the outer density of the filter decreases.

This unique manufacturing process gives Purefer filters a true gradient density that allows for a greater dirt holding capacity and higher filtration efficiency compared to standard melt blown filters made from multiple nozzle blowers.

Stage 3:  5 Micron 100% Coconut Carbon Filter

Pure Coconut Carbon Block Filters are made from a combination of high-performance coconut shell carbon, unique binders and industry leading manufacturing processes to deliver trade quality carbon block filters. They deliver exceptionally low pressure drop while maintaining a high dirt holding capacity with excellent contaminant reduction capabilities.

Pure Carbon Blocks are registered in compliance with NSF/ANSI 42, 53 and 61 for several things, including VOC’s, THM’s, Lead & Heavy Metal Reduction, Chloramine Reduction & Chlorine Taste & Odour reduction. This also includes meeting standards of purity & safety of the materials used.

The perfect carbon block filter is made from 100% Coconut Shell Carbon, which creates what many believe to be sweetest tasting water. The unique pore structure of this carbon is well suited for chemical absorption, including VOC's, while reducing chlorine and chemicals that contribute to taste and odour.

Ultraviolet Water Sanitiser

UV Water Sanitation is by far the most important filtration process when it comes to rainwater treatment. Rainwater harbours bacteria of all types but is some cases much more harmful bacteria may be present in the tank. E-Coli is a common bacterium in tank water and is due mostly to Frogs in and around your tanks/catchment. Ultraviolet sanitation works by breaking down the cell wall of a micro-organism allowing oxidation to occur which in turn prevents the bacteria from multiplying until it is finally eradicated. Ultraviolet filtration is a chemical-free solution to water sanitation creating no by-products in the water.

​We recommend adding the optional UV Thermal Relief Valve for any situation where the UV system is installed and water is not continuously running through the system. This will prevent the UV system from overheating and damaging the seals 

Kit Contains

  • GT7-9K                WaterMark Whole House UV System 40W | 1” Ports
  • GT7-8-BRK (x2)    1 Pair of Aluminium Mounting Clamps + Screws
  • GT7-9K-Lamp       840mm 4 Pin 40W UV Lamp
  • GT7-9K-Thimble    895mm Quartz Thimble 23mm*OD
  • GT7-8K-PS            UL Certified Ballast 40W Australian Plug + Earth Cable
  • GT7-2N-OR           NSF/ANSI 42 Compliant O-Rings Suit 23mm*OD


  • Commercial Grade Electropolished 316 Stainless Steel Chamber
  • Visual & Audible Lamp Failure Alarm
  • 1” BSP Threaded Male Connections
  • Strong Aluminium Mounting Brackets – Surrounds Chamber
  • High Intensity UV Lamps – Up to 50L/min @ 30mJ/cm²

Water Pre-Treatment Specifications

  • Hardness              < 120 mg/L
  • Turbidity               < 1.0 NTU
  • Iron                     < 0.3 mg/L
  • Manganese           < 0.05 mg/L
  • Tannins                < 0.1 mg/L
  • Filtration              < 5uM Particulate Filtration

UV System Maintenence Notes:

Ultraviolet systems are rated based on a dosage level of UV-C radiation into the water (mJ/cm²), with 30mJ/cm² being the standard level of disinfection and a minimum dose of 40mJ/cm² required to comply with Australian Drinking Water Guidelines. Our lamps are rated with a 9000 hour (1 year) lifespan, after which point the lamp will naturally degrade and the level of radiation produced by the lamp cannot be guaranteed.

The UV lamp sits inside a quartz thimble, which protects the electrical components of the lamp from making contact with the water. We specifically use quartz (fused silica) for this application because it is strong, exhibits thermal resistance, and has excellent UV transmission properties.

However, over time, metal ions fused within the silica structure of the quartz thimble interfere with the UV-C radiation produced by the lamp, which reduces the UV transparency of the glass and causes it to become fragile. This process is called solarization.

Tannin, bio-film, algae, and scale can also build up on the outside of the glass thimble, further preventing ultraviolet light produced by the lamp from penetrating through the thimble, and impairing the system's ability to sanitise the water passing through.

Thus, we recommend replacing the lamp every 12 months, and the thimble every 1-2 years.

Triple Filter System:

Suits: Bore, Tank, Dam or Town water
Size: 20" x 4.5"
Ports: 1" BSP Ports (25mm)
Working Pressure: 70psi (500kPa)
Tested Pressure: 325psi (2240kPa)
Max Flow: 60 L/min
Height: 70cm
Width: 62cm
Depth: 20cm

UV System:

Max Flow                    50L/Min (For 30mJ/cm² EOL)
Voltage                      230-240V
Chamber                    316 SS
Ports Size                   1” BSP
Max Pressure              125 psi
Working Pressure        Up To 70psi
UV Lamp                    GT7-9K-Lamp
Lamp Power               40W
Lamp Length              840mm
Thimble Length           895mm
Thimble OD                23mm
Thimble                     GT7-9K-Thimble
Ballast                       GT7-8K-PS


Length                          900mm (Without Plug)
Between Ports               780mm

Earthing: Before operating this unit, it must be earthed. Simply attach the supplied earthing cable connected to the chamber to an earthing rod.

Technical Data

UV systems are not designed to be turned on and off. Doing this may shorten your lamp life. Lamps should be changed every year. The lamp may still be working, but after 1 year, the power may not be able to kill all bacteria. The Quartz thimble should be replaced every 2 years. If hardness is high it is recommended to service and clean the UV thimble every 6 months or as required to remove and scale that may build up.

Dosage – GT7-9K

General Disinfection (Common)                 30mJ/cm²
Flow Rate Maximum (EOL)                         50L/min

Recommended for Drinking Water             40mJ/cm²
Flow Rate Maximum (EOL)                        37L/min

UV System Maintenence Notes:

Ultraviolet systems are rated based on a dosage level of UV-C radiation into the water (mJ/cm²), with 30mJ/cm² being the standard level of disinfection and a minimum dose of 40mJ/cm² required to comply with Australian Drinking Water Guidelines. Our lamps are rated with a 9000 hour (1 year) lifespan, after which point the lamp will naturally degrade and the level of radiation produced by the lamp cannot be guaranteed.

The UV lamp sits inside a quartz thimble, which protects the electrical components of the lamp from making contact with the water. We specifically use quartz (fused silica) for this application because it is strong, exhibits thermal resistance, and has excellent UV transmission properties.

However, over time, metal ions fused within the silica structure of the quartz thimble interfere with the UV-C radiation produced by the lamp, which reduces the UV transparency of the glass and causes it to become fragile. This process is called solarization.

Tannin, bio-film, algae, and scale can also build up on the outside of the glass thimble, further preventing ultraviolet light produced by the lamp from penetrating through the thimble, and impairing the system's ability to sanitise the water passing through.

Thus, we recommend replacing the lamp every 12 months, and the thimble every 1-2 years.

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.

What are the benefits of 20” filters in comparison to the 10” range?

9 times out of 10 we would usually recommend using a 20” Big Blue system and there are several reasons for this.
A 20” filter cartridge has double the surface area of the 10” range. Surface area is vital in filtration for 3 main reasons. 1. Carbon works predominantly on contact time, the longer the contact time with the water, the more chemical absorption takes place. 2. The more surface area a filter has, the longer they will last without changing. 3. The higher the surface, the more likely to reach and maintain a higher flow rate.

What types of filters should I use?

There are a range of whole house filters and all of them have their own unique use. The most common configuration is 5 microns straight through. This is commonly used on tank water and town water based on average water quality. Other things to consider are the micron ratings of your filters. Whole house filters range from 100 microns right down to 0.35 micron. The heavier the sediment in your water, the higher the micron you will require in your pre filter. For example, if you have relatively dirty water (dam or river water) you would usually use a 20 Micron Pleated, 5 Micron Polyspun, and either a 5 or 0.5 Micron Silver Carbon (Depending if you have any additional sanitation). It is best to contact us directly to get the best combinations of filters for your intended use.

How often do I change the filters?

Many filters work off Litres of water however we tend to also use different methods of judging filter life. We have been in the water industry for over 35 years, and in that time have looked over countless numbers of water analytical reports all across Australia. We base your cartridge change off not only L capacity, but also things such as occupants of the house, kitchens bathrooms, your geographical location, your water supply and the system you are using. By doing this you will have an accurate representation of how often you should change your filters for the best possible water filtration. As a very general rule, all water filtration should be changed every 12 months or Sooner if necessary.

What are the optional pressure gauges for? Are they required?

Pressure gauges are a handy addition to your whole house system. They are used to measure your incoming and outgoing pressure throughout the filter system. Initially this will show you your starting pressure throughout each filter and also show the pressure drop between each cartridge. This is predominantly used to monitor the pressure of the carbon block cartridges which affect the pressure more than other filters. The drop in pressure can identify when a cartridge is ready for a change due to sediment loading. This avoids you having to shut off your water and open the system to visually assess the cartridge to check if it is ready for replacement.

If there a whole house system that removes Fluoride?

Unfortunately, no, we do not stock filters that remove fluoride for your whole house. While there are some filters on the market that can achieve up to 80% reduction of fluoride, we choose not to work with them as they rely on Activated Alumina which if not used correctly can be dangerous as they have the potential to leach heavy metals into the water. Fluoride removal is best done through Reverse Osmosis as it is a safe and proven method for total extraction of fluoride. Reverse osmosis cannot be used for whole house filtration due to the waste water factor, so it is best to be utilised under the sink.

Can I install a whole house filter myself or do I need a Plumber?

Whole house systems are relatively straight forward in their design and installation. If you have experience working with plumbing components and fixtures, you may have the necessary skills require to install the system. However, by Australian Law, only a Licenced Plumber may modify your existing plumbing and install a water filter. For this reason, we strongly recommend the use of a plumber for quality assurance and insurance reasons.

Will a Whole House Filter remove scale build up and white staining?

White staining is common around Australia, but predominantly in rural areas including South Australia, Western Australia and the Northern Territory. It is due to Calcium predominantly which in worse cases will create a scale that is hard to clean off at all. A regular filter cartridge alone will not be enough to fix this issue. Calcium is usually in solution which will pass through standard filtration along with other dissolved salts and minerals. Calcium can be effectively treated in 1 of 2 ways.
The more expensive way is by using a Kinetico Water Softener which will remove all hardness (Calcium, Magnesium, Iron and Manganese) and replace it with the lighter atomic weight of Sodium (Na). While this is a highly effective means of removing the hardness, it has a high initial set up cost which needs to be considered. Magnetic Fluid Reactors are also a highly effective way of treating calcium and hardness issues on a domestic level. Fluid reactors require no maintenance or replacement so it is a buy it once product. Fluid reactors re-align the water on a molecular level causing the hardness and calcium to remain in a soluble state. They can help clear our scale build up in pipes and also help treat the white staining you experience on shower screens.

Is there a filter that will remove Chloramine?

Carbon is the only type of filter media that is effective and economical at removing chloramine from a water supply. A brief back story on Chloramine; Chloramines (NH2CL) a combination of ammonia and Chlorine, is commonly used as a secondary disinfectant in mains water as an alternative to chlorination. Chloramines have a tendency to convert organic materials into chlorocarbons such as chloroform and carbon tetrachloride, compounds that have been identified as carcinogens and that have been strictly regulated in the U.S. since 1979.

The by-products produced however have no regulatory levels in our water which could pose greater health risks than the regulated chemicals.

Being pressed by regulations, a high number of water treatment facilities in Australia have had to switch their disinfectants from free chlorine, to chloramines, a compound formed by mixing Ammonia with Chlorine (NH2CL). Chloramines work well in the way they produce fewer DBP’s (Disinfectant by-products) due to they are weaker oxidants than chlorine. Being somewhat useful for disinfecting water economically, Chloramines have many disadvantages. Though chloramines are safe for consumption in drinking water because digestion neutralizes them before they enter the bloodstream, other forms of intake can be dangerous. For example, chloramines have been shown to interfere with the proper absorption of oxygen if taken directly into the bloodstream; for this reason, they cannot be present in water used for kidney dialysis. Similarly, chloramines are toxic to fish (both freshwater and saltwater), reptiles, and amphibians.

The most effective way of removing chloramines from water is to use a twin system with a dual carbon configuration. The extra carbon effectively doubles the contact time with the water, allowing the total removal of Chloramines and the harmful by-products it releases in water.


How do I know what size UV system I need?
Ultraviolet Sanitation Systems are commonly graded based on a pre-requisite water assessment (TDS, Turbidity and Pre-Filtration), and a Peak Flow Rate. There are 4 Main types of UV Systems for domestic use. Firstly, there is Undersink or Drinking Water applications; These systems tend to be quite compact which is convenient due to space requirements. The flow rate on these systems range from 3-6L per minute which is suitable for use with a Drinking Water Faucet Tap. Next, you have the Small Home or Caravan/Granny Flat Size UV which is capable of up to 30L/Min (Or 2-3 Outlets running simultaneously). While this sized system is a great way to help budget your water filtration & Sanitation, you need to ensure that your flow rate does not exceed 30L/Min. The most common UV system you will come across is the Whole House Water Sanitation System which utilises a 40W globe to run up to 50L/Min. This system is enough to cover most domestic applications on houses with 2 bathrooms and kitchen. When a more commercial type application is needed, say for a block of Cabins or multiple houses, a Semi-Commercial Sanitation Unit Is required to achieve the peak flow rate between 90 and 200L/Min.

Does UV require Power to run?
Yes, the UV systems will require standard Australian 240V power supply to run. The ballast is a multi-level unit capable of powering systems from 10W up to 40W. It is recommended to leave the UV running at all times, when the UV light is turned off repeatedly, the life of the lamp may be reduced and rendered ineffective. It is also required that the UV is connected to the power via a surge protector.

What is the UV Filter made from?
Our UV systems are made from Industrial Grade, Certified 316 Stainless Steel. Many Australian suppliers elect for the cheaper 304 grade to minimise their cost, and still charge a premium price.

Does the UV system require servicing and is it DIY?
The UV lamp itself has an effective lamp life of 12 months or 9000 Hours. Replacing the lamp is a few simple steps: Firstly, turn off the power. Remove the rubber boot and slide out the UV tube, replace with the new tube, re-insert into the UV system then turn the power back on. Ensure that the lamp does fire correctly then the system is ready for service once more. The Quartz Thimble which encases the UV lamp and seals the water does require servicing also. We recommend that a licenced plumber conducts this as it involved un-installing the glass thimble. Over time, you may get Scale & Sediment build up on the quarts which can inhibit the effectiveness of the UV lamp. Clean this thimble using mentholated spirits and a new microfiber cloth, then rinse with water. NOTE: try not to get water inside the tube during this process. The UV Thimble is recommended to be replaced every 2 Years.

Does the UV system go BEFORE or AFTER standard filtration?
The UV system must be installed AFTER standard filtration. This helps to ensure that the prerequisite water parameters are met for the UV lamp to work effectively.

Is there anything else I need to do when installing a UV water filter for Whole House?
Ultraviolet Sanitation Systems will only be effective at treating the water that passes through the chamber. It is possible that there are traces of bacteria and viruses that are already present within your house and plumbing, mainly around fixtures and anywhere close to open air. We recommend as a precautionary measure to dose your water tank with HydroSil Water sanitiser and then opening up numerous taps around the house to allow the HydroSil to flow to all areas of the house, killing any residual bacteria and viruses that can be found in the house. You can then safely install your UV system, knowing full well that your water will now be 100% Bacteria and Virus Free.