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Licenced WaterMark Supplier

Twin Undersink Water Filter System Housing 10" x 2.5" with 1/2" Ports + Opening Spanner | Watermark Certified (GT1-3W)

In stock
Quick Overview
  • Twin Undersink Filter System Housing

  • Ideal for Replacing a Leaky Filter Housing

  • Filters Sold Separately

  • WaterMark Certified Housings - Tested to over 300PSI 

  • Standard 10" x 2.5" Size - Fits Common Filter Cartridges

  • Heavy Duty Steel Bracket

  • 1/2" Ports 

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WaterMark Certified Housings

These Water Filter Housings are certified to WaterMark Standards AS/NZS 3497 Under the 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.

Under no circumstances should a thread sealant be used on water filtration housings – thread tape ONLY is permitted.
If thread sealants are used, all warranty is void.

INSTALLATION - Please note this system is WaterMark Certified to Australian plumbing standards (AS/NZS 3497), and will need to be installed by a licensed plumber. Simply order online with free shipping to your home, and once it arrives any local licensed plumber will be able to do the installation (the system also comes with instructions)!

Replace Your Existing System

The Basic Twin Undersink Filter with 1/2" ports.

Kit Includes

  • Twin Undersink Water Filter System (No Cartridges, no fittings)
  • Opening Spanner 


Height: 36cm
Width: 24cm
Depth: 12cm

Ports: 1/2" NPTF
Housing: Dual O-Ring

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.